No video
Undercoating Removal - 1978 Datsun 280z
Рет қаралды 18,181
Күн бұрынUndercoating Removal using every method possible. Which one works best?
Watch the entire video below to find out!
Using the links below helps the channel earn a tiny commission from amazon affiliates and ensure we can continue to bring you the best DIY garage content on KZfaq!
Super Clean Degreaser -
1 gallon amzn.to/35ymHDl
6 gallons amzn.to/2HnnGhK
Aerosol -
17oz - amzn.to/3mcX2qm
Spray bottle Foaming 32oz - amzn.to/3ohuCxg
Spray Bottle Degreaser32oz - amzn.to/34mZ8Oq
Norton stripping discs 6 pack amzn.to/3oqJ4D6
Al's liner nylon cup brush 180 grit
4" cup brush - amzn.to/3eZmkpB
6" cup brush - amzn.to/36rERab
Use on BUFFER at low rpm NOT ANGLE GRINDER!!!
3M Roloc Discs 1"
Disc Pad Assembly - amzn.to/2Tma2h3
Bristle White (120 Grit) - amzn.to/3oiihJn
Bristle Yellow (80 Grit) - amzn.to/3mhriR0
Bristle Green (50 grit) - amzn.to/3kuMlyU
3m ROLOC Discs 2"
Disc pad assembly - amzn.to/3jvAEGR
Bristle Green (50 grit) - amzn.to/31VnYU7
Bristle Yellow (80 Grit) - amzn.to/31D7Mqh
Bristle White (120 Grit) - amzn.to/37JqlNv
Woven Coarse - amzn.to/31D9dFb
Woven Med - amzn.to/3dV4fbV
3M ROLOC Discs 3"
Disc Pad Assembly - amzn.to/35pW8A8
Bristle Green (50 grit) - amzn.to/3kuMe6s
Bristle Yellow (80 Grit) - amzn.to/2Ho7MDP
Bristle White (120 Grit) - amzn.to/35zddI5
Woven Coarse - amzn.to/31D7Xlr
Woven Med - amzn.to/34oMhLt
Angle grinder bristle discs 4.5"
Brown (36 Grit) amzn.to/3mekVOc
Green (50 Grit) amzn.to/2Tk94lx
Yellow (80 Grit) amzn.to/3mkQRRb
White (120 Grit) amzn.to/3kxKoC8
If you are looking for Datsun parts, don't forget to check prices on DatsunPartZ.com
Visit our Facebook page at / hcrmotorworks
or send us a message @HCRMotorWorks
In video credits
Dustless Blasting - • Dustless Blasting Stri...
heat method - RavingMadProductions - • How To Remove Car Unde...
Acid Dipping - MetalWorks Paint & Rust Removal - • 1967 Camaro before and...
Dry Ice Blasting - Troy Hallewell - • Video
@hcr-motorworks 3 жыл бұрын
Buying ANYTHING from AMAZON??? Click any of the links above and then go buy WHATEVER YOU WANT!!! The shop will earn a tiny commission from whatever you buy! It doesn't have to be the actual product on the link!
@MJBSportActive 2 жыл бұрын
Great clear instruction on all the different type to remove undercoating Extremely helpful
@hcr-motorworks 2 жыл бұрын
Glad you enjoyed it!
@davidapp3730 2 жыл бұрын
Thank you for that video. I am removing the tar based underseal. Heat does a good job with a solvent following up to get the last of it off..
@hcr-motorworks 2 жыл бұрын
Thanks for watching
@jm1551701 3 жыл бұрын
I am so glad I came across your channel, I am your average restoring the car in the home garage guy, and I just completed stripping my 66 Chevelle body to metal, and like you mentioned I to do not have accesses to any big expensive stripping machines or acid dipping, so it's been all by hand like yourself in your video, and I too used the Aircraft stripper to battle through all the layers of Factory and what ever was applied to the car for the past 50 years, all methods where used as well, but it's done now to the under carriage like you just completed , hence I am glad I watched your video, I will be buying the Needle gun at HF, so that will help I already finished the wheel wells and also found that the heat gun was the best choice I will be putting the car on a rotisserie to now get to the rest of the bottom, your video is inspiring so I am ready to go, I'm glad I'm not the only one out here putting in the old elbow grease to get it done, I am hoping that a lot of comes off in small sheets, from what I have seen on some of the floor pan I have replaced that some of it came off pretty easy, and to my surprise I noticed factory paint on the bottom of the floor, have you ever come across this?
@hcr-motorworks 3 жыл бұрын
Thanks for subscribing and watching! Consider yourself lucky if you can get the undercoating off of ANY car and still be able to preserve the factory paint, like go buy a lottery ticket kind of lucky!
@charlesboyle6000 2 жыл бұрын
Thanks for doing all of the research there. You are making my life easier
@hcr-motorworks 2 жыл бұрын
Haha hope it saves you some time my friend!
@jamesward5721 Жыл бұрын
I have to remove underseal every day at work - we repair rust. I give all the "clever" stuff a miss - I grab the Map gas torch & burn it off like you did here ^^- you don't need to go crazy, just waft the torch about - the underseal goes brittle & you can easily scrape it off down to the clean bare metal, I use an old wood chisel for that. It's a fast way to get it done & there's no complexity. We have a big blaster set-up btw, but I would never reach for it to remove underseal - a torch works best,
@hcr-motorworks Жыл бұрын
Yep! Exactly why I made this video. All the other options cost multiples of money when compared to the torch and scrapper. Although I do prefer the stripping discs myself.
@mkitbde 4 жыл бұрын
Wow, thanks for doing all those trials and sharing your results, really helpful! I may just have to save my $$ for dustless blasting haha. I have a 73 240z, so hopefully I have the easier under coating that you described. Thanks for the great content.
@hcr-motorworks 4 жыл бұрын
Dustless blasting is definitely easier...but takes all the fun out of it! Undercoating removal is a right of passage for Z owners...as is rust repair, and spindle pins! haha Enjoy!
@reeflexyoutube9709 3 жыл бұрын
I'm doing it myself currently, I used the wire brush on the angle grinder. Gets pretty messy but comes up clean and not too time consuming then use gunwash on a rag or some green scotchbrite
@hcr-motorworks 3 жыл бұрын
yep just have to be careful with heating up the panel with the wire brush method. good luck!
@stevenchovan4823 3 жыл бұрын
I was looking at all these options and your spot on prices. Thanks for the pros and cons of each.
@hcr-motorworks 3 жыл бұрын
Glad it was helpful!
@jrodpadilla22 4 жыл бұрын
Great video and trying the different methods!!!! Abrasive blasting or wire wheel you are left with a ton of residue to deal with that gets in the nooks and crannies
@hcr-motorworks 4 жыл бұрын
Thanks for watching, Yea unfortunately theres no easy way to complete this task. Its a terrible experience no matter which direction you take.
@jrodpadilla22 4 жыл бұрын
@@hcr-motorworks I agree! I have done the blasting method since I have my own sandblasting equipment and have used heat and wire wheels as well. Terrible job in general, but great job!
@hcr-motorworks 4 жыл бұрын
Thank you!
@wpeezy10 2 жыл бұрын
Currently doing this on my 77 280 with an air chisel. It’s insanely frustrating! This stuff is no joke to get off!
@hcr-motorworks 2 жыл бұрын
Go easy with the chisel! Its super easy to damage the thin metal on these things!
@wpeezy10 2 жыл бұрын
@@hcr-motorworks noted! I’m about to give in and rent the dry ice machine 😤
@hcr-motorworks 2 жыл бұрын
@@wpeezy10 haha I know the feeling! I do not envy you right now lol
@tarantodesign 3 жыл бұрын
Invaluable information here. Thank you
@hcr-motorworks 3 жыл бұрын
Glad it was helpful!
@michaelzeece1300 5 ай бұрын
As an old car buff I understand the desire to restore the them to pristine condition. However, as a retired chemist I must point out the dangers involved in some approaches shown in this video. The use of dry ice-solvent mixtures represents a very high risk of explosion and fire. While the liquid portion of these mixtures may be below their flash point, their vapors are not. I know because I witnessed such a fire in which 2 coworkers were horribly burned. Additionally, dispersion of particulates in the air, in combination with various solvents, represents a hazard your lungs. Particulates and most solvents are not effectively removed by filters one can buy over the counter. My recommendation is to take your classic to a professional.
@neptalialbo6649 Жыл бұрын
Very helpful...I'm your new fan from Philippines...Best Regards 👏☝️❤🙏
@hcr-motorworks Жыл бұрын
Awesome! Thank you!
@jamo5 3 жыл бұрын
citristrip gel,lay plastic on top to keep it wet for 24 hours. put it on thick. smells waay better than aircraft remover. it will fall off like slices of bread. just did a whole early bronco a genius covered entirely with undercoating.
@hcr-motorworks 3 жыл бұрын
Gotta love the "cover everything in spray on bedliner" trend! haha
@jerryp2433 2 жыл бұрын
How do you lay plastic if it is underneath the car? Rotisserie?
@GregariousAntithesis 3 жыл бұрын
Next to sand blasting abrasive disks are about the only thing even close in terms of metal prep for paint adhesion.
@hcr-motorworks 3 жыл бұрын
They definitely did the trick here!
@sainone67 3 жыл бұрын
This is just one of those grueling pain on the ass jobs. Im doing a honda right now with a double coating. Factory rubber coating and an aftermarket tar based coating. The tar based coating comes off well with the heat and goo gone method. Has to be hot for the goo gone to work. Thats the easy coating. The factory rubber coating.. holy moly thats tough. Its the same as you described (spray on seam sealer) Using oscillating tool then heat and wire brush for what's left. Ill be about 80 hrs in of pure head and back aches. But its these things that set a build apart from the others. Keep at it guys. Its tough work.
@hcr-motorworks 3 жыл бұрын
Yea its a terrible task, Thanks for watching!!!
@cons2899 3 жыл бұрын
Nissan: "just spray some seamsealer" Benz: "spray all the seamsealer, twice"
@hcr-motorworks 2 жыл бұрын
did we say twice? we meant 3 times...everywhere. lol, so true
@zpbeats3938 7 ай бұрын
Working on an 87 mk2 golf. Holy shit its the thickest, nastiest, undercoating ever. Such a bitch to remove!
@mikegadoury6172 4 жыл бұрын
I just finished this dirty, crappy, brutal task of striping the undercoating on my 1978 280Z. The Eastwood Pre-paint prep solvent takes the residue of the remaining undercoating right off. As a side note I used their down to metal stripper to actually remove the undercoating - worked well, but what a mess.
@hcr-motorworks 4 жыл бұрын
Thanks for watching! If it was an asphalt based undercoating I have no doubt that any solvent based pre-prep would have wiped it off without issue. However the gray stuff was something else. We tried literally everything liquid and it wouldn't touch it. All wax and grease remover (pre-prep/prepsol) is pretty much the same ingredients and SPI's wax and grease remover didn't do a thing. We ended up doing the same thing as you in one area with the aircraft stripper, but I hate that stuff with a passion!
@1Hitmanvee 2 жыл бұрын
The z's where known as ''The poor man's Ferrari '' you know half the engine same kind of look Porsche's where known as overgrown lawnmowers
@hcr-motorworks 2 жыл бұрын
All I know im still poor and would still take a Ferrari or a Porsche haha
@pigidly 2 жыл бұрын
I herd instead of the air scaler you could use a electric vibrating multi tool with the flat saw attachment… some guys don’t have a 80 gallon compressor. But I didn’t try it.
@hcr-motorworks 2 жыл бұрын
Yea that also works, Its just a pain to scrape it off at the correct angle for any length of time without running into the next weld/bracket/screw/mount
@richardwainwright507 2 жыл бұрын
Now imagine doing all of that, but upside down.
@hcr-motorworks 2 жыл бұрын
work smart not harder, rotisserie is the way to go!
@79TEOG 4 жыл бұрын
The music is a little much, way to loud and takes away from the video. Jmo
@hcr-motorworks 4 жыл бұрын
Thanks for the feedback!
@lonerider5982 Жыл бұрын
What kind of Jeep is the one on the rotisserie? Sorry I'm just 3 years delay
@hcr-motorworks Жыл бұрын
That one was a M151 Jeep
@jerryp2433 2 жыл бұрын
Is it worth it to get it in the rotisserie? I'm not sure I want to strip everything off the frame.
@hcr-motorworks 2 жыл бұрын
Absolutely worth it to put it on a rotisserie. This is my 2nd time doing a z resto and can say there's no way I would want to do ANY of this work on the floor underneath jack stands or on a lift. This a quality rotisserie if you need one for a great price! amzn.to/3Dl8MAk
@Ryan-wf7sh 3 жыл бұрын
Did you end up trying the oscillating tool? No good I’m assuming
@hcr-motorworks 3 жыл бұрын
I did try it, it wasn't the best but it did work on the thicker parts fairly well.
@David-ty1xz 4 жыл бұрын
MEK? I was afraid the last liquid remedy was going to be MEK, which may have worked, but in my opinion thats stuff is worse than the Aircraft Stripper. I have a 240Z on the rotisserie right now and I'm just about to do this process, thanks for posting. I saw the other video whe n you got everything clean and epoxy primed, how long was that process, and were you concerned for flash rusting? I'm in the South and I dont think I could leave bare metal even for a night without having rust. What was your secret, or did you actually do all the work within a few days?
@hcr-motorworks 4 жыл бұрын
Haha yea i strayed away from MEK only because i wanted to keep it more or less diy user friendly, and MEK is most definitely not user friendly and id hate for someone to go buy some and think its as safe as using acetone or the typical diluted stuff most normal people have access to. MEK is some seriously narly stuff and i just couldn't feel ok about me endorsing its use for the average joe. Timeline wise it was in bare metal for a few weeks to a month, i don't think you'll have major issues with flash rusting honestly. Im in the south too and have left things in bare metal for months without issue, as long as its not getting rained on or something.
@David-ty1xz 4 жыл бұрын
@@hcr-motorworks Thanks my friend. I'm about to go out in the shop in the next day or two and start the process on my 73 240. I have some MEK handy, I'll give a report on it use.
@hcr-motorworks 4 жыл бұрын
@@David-ty1xz if you have an early 240z you 'should' have the tar based undercoating wich will come off with MUCH less effort than the stuff i had to deal with. Best of luck!
@David-ty1xz 4 жыл бұрын
@@hcr-motorworks Ok, I'll let you know how it turns out.
@GregariousAntithesis 3 жыл бұрын
Take two pieces of steel clean and prep one as you normally would with sand paper then sand blast the other and prime both. Let them cure 24 hours and take your finger nail to both the sanded only prepped surface can easily be scraped off the sand blasted surface is like a chemical bond. Not all prep is the same that is fact and while it might cost you a bit to get something blasted you cannot compare to the prep it does. I have used a simple pressure tank 100 dollar harbor freight blaster with fine coal slag abrasive from tractor supply cost 10 bucks for 50 lb bags. Then you get large tarps or 5 mil plastic aheeting cover your work area even up about 3 to 4 up the walls then you can capture, screen and reuse the media a number of times. It is slow in contrast to paying a pro but its cheap. Wouldn’t use it for removing undercoating just paint, primer and rust. Oh and for F*** sakes wear a quality respirator based dust mask and ventilate the work area or do it outside under covered area.
@hcr-motorworks 3 жыл бұрын
I've blasted many other vehicles prior to this one, it was time to showcase something a bit different. Proper prep is key for sure! Silicosis is a real thing and proper respirators are a must if blasting with dry media!
@reeflexyoutube9709 3 жыл бұрын
What is the process of reapplying paint and deadener ?
@hcr-motorworks 3 жыл бұрын
surface prep - kzfaq.info/get/bejne/fcqRo7mc2L-rdps.html
@hcr-motorworks 3 жыл бұрын
epoxy primer - kzfaq.info/get/bejne/oLqqasyGsJazeZc.html
@hcr-motorworks 3 жыл бұрын
raptor liner - kzfaq.info/get/bejne/pdOlqJmAy5eXaGw.html
@GregariousAntithesis 3 жыл бұрын
As far as prep for bed liner as rust free and clean as that car is you would have been far far far better off getting to original paint and scuffed it or my obvious fav do light sand blasting from a further distance and a sweeping motion to just roughen the original paint then touch up and bare spots with a good epoxy primer then lay down your bed liner within the correct time frame for the epoxy primer to top coat per specs.if you dont top coat epoxy primer within a short window any top coat will not stick and it will sheet off of it like paper unless you sand it. I agree with using seam sealer but i dont think it can be applied and the bed liner applied over the top within the. Epoxy primer top coat window without sanding.
@hcr-motorworks 3 жыл бұрын
The epoxy I use (SPI) has a 7 day recoat window without scuffing, but yes your correct outside of that window and you MUST scuff it if you want it to stick.
@GregariousAntithesis 3 жыл бұрын
@@hcr-motorworks 20 years as an Aviation Structural Mechanic in the Navy as well as hobby auto repair and restoration. With that said, we always tape off both sides of a seam before sealing then use light pressure with a spreader then peel the tape and follow up imediately with soapy water and our hand to smooth over the edges of the sealant and leave it looking really nice. Of course if your going to paint over it the soapy water would have to be rinsed off after the sealant gets firm. We do it on aircraft obviously so it doesn’t cause friction or peel off when the aircraft is flying between 300-500 mph kind of critical but it also looks professional and it forces the sealant down into the joint.
@hcr-motorworks 3 жыл бұрын
Yea that's exactly what I do on any seam that's exposed on the body lines and will be top coated with base color and clear...on an undercarriage that is going to be top coated with epoxy and bedliner its overkill lol.
@GregariousAntithesis 3 жыл бұрын
@@hcr-motorworks going to bare metal in this case was overkill.
@anthonycard1026 3 жыл бұрын
I just removed all rocker guard ,paint and primer down to bare metal in seconds using my grinder with a screw on attachment that has course lapped sandpaper. I have 2 more doors to do. I hired a guy for rocker panels and he put rock guard 8'' op the door. looks like shit.
@hcr-motorworks 3 жыл бұрын
The problem with the flap discs are they remove TOO MUCH too fast, you run a really high risk of warping or actually grinding the metal once you get to it. I recommend using the norton strip it discs for the simple reason that once you get to metal, your not removing metal. With the flap discs you most definitely are grinding the metal even thinner.
@anthonycard1026 3 жыл бұрын
@@hcr-motorworks Thats true but only if you don't keep it moving at a decent pace. Making the grinder sit still Will warp. for hard to reach areas I sand blast.
@Dutchman294 2 жыл бұрын
Sorry but $1500 to take the car somewhere and get it sand blasted seems a lot safer and overall less frustrating than doing it manually like this.
@hcr-motorworks 2 жыл бұрын
I agree, but most of my viewers don't have 1500-2k laying around so i made this video to showcase all the cheaper but much more labor intensive ways to complete the same task.
@boydgemmen9213 3 жыл бұрын
Is there any good way to remove it without removing the paint underneath?
@hcr-motorworks 3 жыл бұрын
Unfortunately not really. Most of the things you do to try to remove the undercoating will scratch or remove the paint as well
@kopiwerks 2 жыл бұрын
Heatgun, scraper, heatgun, goo gone, steel wool
@user-lo5vk1ne4y 2 ай бұрын
it truly is an unfortunate task don't do it yourself if you really have to, pay for someone else to do it
@stevewheat9030 9 ай бұрын
How many days did it take you to strip it the hard way??
@hcr-motorworks 9 ай бұрын
I think this whole process took about a week.
@jonathanjuarez8211 2 жыл бұрын
Quick question, how high is your rotisserie bar? I'm building one myself and want to make sure it rotates without hitting the roof. Also thanks for the video since it's my main motivation behind building a rotisserie.
@hcr-motorworks 2 жыл бұрын
Honestly with the price of steel and usability/safety of the homebuilt version i would HIGHLY recommend buying this one instead amzn.to/3KdJLdN Its not often I recommend buying over building anything but in this case it doesnt make sense to build it when you get so much more for buying one that can be used for way longer and can take the weight when you start adding doors, glass, etc. The engine stand version always felt sketch and could barely handle an empty shell.
HCR - Motor Works
Рет қаралды 76 М.
Repair Geek
Рет қаралды 2,5 МЛН