SPRAYING GELCOAT DIY STYLE FOR BOAT REPAIRS!

Рет қаралды 78,817

Жыл бұрын

For the most part spraying is something that I usually try and sway folks away from because of the mess, cost for equipment and experience needed to get a quality finish. When it comes to paint I couldn't guess how many times I've mentioned that if you're just getting started you'll get much better results rolling than trying to spray for the first time. It may not be as sexy, but it's the truth...
Now that's with paint; gelcoat is a much more forgiving animal to try and tame if you have a few tips and tricks in your back pocket ;-)
Hope this helps with some of your projects!!
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Пікірлер: 81

@designfabrication512 11 ай бұрын

That was generous of you to share your knowledge for free…. I don’t have a boat and I’m not making a repair ha but I’m smarter today than I was yesterday. Cheers

@BrokenBlade55 Жыл бұрын

Thanks for another great video. No matter how many of your videos I watch i still say the ending with you daughter and always smile. It reminds me of all the time I lost with my kids when they were little. Now im loosing all that same time with my grand kids

@chasingsunsets380 Жыл бұрын

Great advice, learn so much on this channel.

@pezpengy9308 Жыл бұрын

i dont use them but ive always been curious about these things. thank you for doing this.

@larrycassidy1702 10 ай бұрын

Great job. Thanks for the advice

@TotalBoat Жыл бұрын

Great tips and info!

@ermannodibenedetto3064 Жыл бұрын

Perfect as usual.......

@mattcvac Жыл бұрын

Thanks for showing this very informative. Another idea to demo would be the $10 Harbour freight paint sprayers. Always wondered if they would work.

@alanswanson5642 Жыл бұрын

That is exactly what I was going to ask will the cheap harbor frieght sprayer spray it?

@aaronsapp5556 Жыл бұрын

Me too

@Boscovius 8 ай бұрын

I don't know why a HF sprayer would not work, but I would advise going for a larger aperature spray tip rather than the stock one.

@joshspiers8888 Жыл бұрын

Finally!!!! Thank you

@freddynews6478 Жыл бұрын

Andy, thanks for this video. Maybe do one on some of the rattle can that come with the hardener, that you mix in then shake and spray.

@alixbarks 4 ай бұрын

Thanks, great video. Clearly explained why not to use waxed gel coat. I have been sealing sprayed gelcoat with any brand of Mega Hold Hair Spray. Same key ingredient as PVA. But way cheaper and already in a spray can. Works great. Wash off with warm water. Just let the gelcoat sit for a couple of hours to be sure all solvents have evaporated before spraying Mega Hold. Credit to some article in Epoxyworks Magazine for the idea.

@kurtwerner4258 Жыл бұрын

Good stuff andy!

@JAR2.0 Жыл бұрын

Indeed very helpful!

@skipbaker529 Жыл бұрын

Now I know why I had no success with those sprayers! Cheers!

@robertschulke1596 Жыл бұрын

Try wrapping a hot wet rag around the Preval sprayer. It will help keep the temp up and make the cartridge last longer. Works for rattle cans too: a bucket of warm water (not hot!) will give them a boost when they’re cold.

@rvierra7235 8 ай бұрын

Cool video, thank you for posting. Over the years, I have used (got suckered is more accurate) into using the latest greatest alternative gel coats. I have found if it matrers, there is really only one answer, and that is the real (traditional) thing.

@bobw222 Жыл бұрын

Just realized I've missed two months of your videos. Checked and Yup, I was still subscribed. HOWEVER, YT changed the notification bell from "All" to "Personalized."

@rogerlanoie5848 Жыл бұрын

My old spray tan set up from a tanning salon works great for spraying cut gelcoat ( and everything else ive tried to run thru it )

@billroderick2028 Жыл бұрын

Having worked in a yard my whole career the Preval was the primary sprayer for small areas. The MOST frustrating thing was the inconsistency of each unit. You can pretty much get a system going where you can mix the gelcoat consistently to get good results but the sprayers drove me crazy. We would but at least 1 case maybe more at a time & if your in a cycle of doing a lot of sprayers it's ok. But buy a case, use a few then let the others sit for a few weeks, grab 1 & start using it & the propellent has leached out so it's useful for 20 seconds & dies. Now you have to scramble around because you only have so much time with the mix.

@alanc.142 Жыл бұрын

How long have you worked on boats for? Prevals work if you know how to use them. If the gel is thin and preval has gas still and is not cold, It has to be the small hole that’s clogged up at the bottom where you insert the plastic straw. A lot of times the hole is really small which causes it to spray like crap . Get a thin metal pin and make it bigger. Make sure to also clean it thoroughly with acetone inside and out

@reubenpsaila1605 9 ай бұрын

@@alanc.142p

@stevejackson4136 Жыл бұрын

Hey Andy. Have you done a video on drilling a transom for an outboard with over size holes, filling the holes with epoxy then redrilling to the proper size?

@WreckDiver99 Жыл бұрын

Keith Rucker over at VintageMachinery used one of those to paint some old Cast Iron Norton Tri-Stone holders....he said he most likely wouldn't use them again. The things constantly froze up, and did exactly what you said...and that was enamel paint that was properly thinned. He said he'd pull a sprayer out to do it next time.

@grantjones9740 Жыл бұрын

I use these pre-valves often and one thing you can do is keep a heat gun handy and keep them warmed up as you go I just pop them off the top and warm them for about 15 to 30 seconds then resume

@IteKLF Жыл бұрын

Video suggestion: a re-visit: "teak" decks. Fake teak/eva/foam.. maybe theres even some good and cheap alternatives? Id like to try spruce wood, oiled with color that makes it look a bit like teak. Good idea or not? Thanks for a great video knowledge source for all my boat projects!!!

@MJ-vs1hf Жыл бұрын

they work great completely vertical, but are much more difficult to use at weird angles

@robertanderson3282 Жыл бұрын

how good is physics, colder the temp the less pressure you get out the nozzle, plus this vid convinced me that 2 pac is the way to go, just prep a bigger area and blend it

@jkfroggy Жыл бұрын

I've used these to spray PVA on top of fresh gelcoat. Spray 2-3 coats with 5-10 minute drying time between.

@edwilkinson6021 Жыл бұрын

Check the MSDS for the propellant contents.

@KayakDIY Жыл бұрын

Tried Preval with variety of house paints and it clogged due to freezing of the outlet. Pressure drops and it freezes quick. I tried it in Florida and maybe paired with the humidity it was worse at freezing. 🤷‍♂️ Absolutely worthless. Maybe could work with thin stains. I can’t imagine using it with gelcoat.

@chellietesta7876 Жыл бұрын

I just bought one of these sprayers to try with Awlgrip. Have you tried the Awlgrip yet with this sprayer?

@sparkyprojects Жыл бұрын

With any product, there should be a 'material safety data sheet' so for that sprayer just search for 'Preval sprayer MSDS' and you have the answer ;) I used to have a spraycan that was refillable, but you pressurisde it with a standard air compressor or tyre pump (search for 'refillabble spray can' you should be able to find what looks like a normal aerosol can, but with a tyre valve

@jonathanrighetti5897 Жыл бұрын

I repair leather seats and I use these when I need texture to hide a repair to reproduce the grain pattern in a door or seat or armrest, they simply spit to much. I would recommend a badger. 250-4 with large nozzle.

@Jason-zr6il Жыл бұрын

Hey, I have a 26ft I want to spray(first time). I have 5gallons of waxed gelcoat. Should I spray one side of the boat at a time to get as much build up or should I try to go around the boat a few times before it kicks? What advice do you have?

@joelbrown4110 Жыл бұрын

Could you apply a layer(or multiple layers over 1 or more spray sessions) of laminating resin w/o wax and then final layer with the resin w/wax so the whole thing will cure hard? Re-coat time interval for all layers could be multiple sessions over multiple days. I am assuming that the requirements would be the same as using laminating resin when laying up glass, do not require sanding between layers(if done in a reasonable amount of time of course), is that correct?

@terrybentz501 Жыл бұрын

I Work at a boat shop in Northern lower Michigan. Been seeing Centurian/ Grady Whites with hull blisters lately. New boats If you could have a video covering this would be great. Repair blistered as well..😬

@terrybentz501 Жыл бұрын

Centurian says from the factory only Up to 2 weeks in the water or voids warranty.. How do you repair something like this? Is there something going on with EPA and restrictions on resins??

@joefish1498 5 ай бұрын

Is the amount of hardener based on volume of gelcoat without cut?

@robertkowalski9906 Жыл бұрын

Harbor freight little touchup gun drill the tip ( can't remember the exact size i can check if your interested) spray two coats not thinned then sand to 100, then take your good gun thin to 17seconds on a Zahn #4 cup spray looks like glass...I like styrene too but has a short self life. oops! thats a ford #4, hey I bought it like thirty years ago.

@chris01479 8 ай бұрын

Hi, I have got questions. How do you stop the leaks in the air vent? Do I need to remove the filter from the tube when I spray 2k primer, 2k clear coats and base coats? Can I refill 2k primer and 2k clear coats and reuse it again?

@UKlelegirl Жыл бұрын

Is there an alternative way to touch up an area about 1 sq foot? Roller? I haven’t used an air brush before. Can you show us these alternatives?

@chrish2996 Жыл бұрын

Hi Andy. Wouldn't it be easier to use the Gelcoat with the additive you used on the dinghy and roll it out for a small repair. Great video thanks 😊

@facilis 11 ай бұрын

Just what I thought too

@ashwahmoodie2541 Жыл бұрын

Wow think my boat may have blisters in the gel coat as well I just picked it up not too long ago

@ryanhernandez2414 Жыл бұрын

pretty sure your dad was willie nelson, thanks for all your videos ive learned a ton

@jaywinters2483 Жыл бұрын

How’s the shoulder holding up, Andy?

@davidmontgomery1016 Жыл бұрын

How about using one of those on that green spot behind you. That unfinished section on that amazingly shiny and dark hull bugs me every week. 😂

@guyyates3284 Жыл бұрын

Andy ....I want to reapply gel coat on my boat with a dump gun ....how much gel coat do I need .....how much coverage does a gallon do and at what thickness do I need ....please help.....

@jerrykroskie7782 Жыл бұрын

Damm I used the durateck on the bottom of my 1972 boston whaler will it blister on a trailer boat? I've had a problem micro cracks appearing after filling yes it has the boston whaler alligator pox on gel coat I have used the 3m vinylester filler. the latest try is to soak the surface with west epoxy with slow hardener it been on a test area 3 months so far its ok should i use hibuild epoxy primer im finishing the topsides with paint. will paint on the bottom stave off the blisters I hate to flip it over again thanks jerry k

@aleksandrkamenev5532 Жыл бұрын

Andy I'm apply same sprayer -garbage only I just spoiled a portion of the gelcoat ,,, there is a liquid in it that probably just interferes with the normal spraying of the material, it may be necessary to heat the balloon to a certain temperature before use, but it does not work correctly, as shown in the advertisement in general

@djmjr77 Жыл бұрын

One question I have about above vs below the waterline.. regarding gelcoat, fillers, paints etc.... is this only for boats that live in the water or also for trailered boats that live most their life's out of water?

@boatworkstoday Жыл бұрын

The project that blew up on me was a trailered boat. Spent maybe a weekend in the water on a fishing trip and it blistered :-/

@djmjr77 Жыл бұрын

@@boatworkstoday guess that answers that definitively 😀 Thanks!!

@fishingwithcamo-joe88 Жыл бұрын

DAMN!!!! @5:05

@n2ghtowl Жыл бұрын

Just out of curiosity what size nozzle do they have? I tried a compressor and spray gun with 2mm needle/ nozzle and it was spitting quite a bit even with a 2% styrene added to thin it out.

@boatworkstoday Жыл бұрын

I honestly don't know what size nozzle Preval has, but it's pretty small. If I were spraying gel with a regular gun and compressor I'd be reaching for something 1.5mm - 2mm

@christophermejia9470 Жыл бұрын

I just brushed gel coat on my transom should I add marine paint to protect it ? Did I miss something 😢 hasn’t been in water just yet either 😬

@christophermejia9470 Жыл бұрын

Or is it just when thinned out and sprayed will it blister? 🤔

@dcrahn Жыл бұрын

They use either propane or butane as a propellant.

@acornfire Жыл бұрын

Does the gelcoat without wax harden up? Do you have to do something additional to replicate the action of the wax?

@boatworkstoday Жыл бұрын

Usually I'll let the gel setup for a few hours (or even overnight) then do a light coat of PVA to fully cure things :-)

@pinkyhotmessx69 6 ай бұрын

I would say it's CO2 cartridges like they use for whip cream canisters.

@URbeatSon 10 ай бұрын

My guess is its dimethyl ether or some other HC like propane

@paulw2583 2 ай бұрын

Have you ever used pledge to cover the unwaxed gel coat? I heard it will allow the unwaxed gel coat to cure…

@D2O2 Жыл бұрын

SDS says the propellant is 30-60% propane and 30-60% butane.

@Hennessey_and_smoke Жыл бұрын

Your shop temp is 68!? It's 25 degrees outside.

@grubbetuchus 3 ай бұрын

Great video. Fantastic explanations. The added music is untennable, sorry to complain.

@tobeyoxley591 Жыл бұрын

Take a look at the 3M Accuspray PPS system. Tips and cup liners are disposable. Preval on steroids!

@todddunn945 Жыл бұрын

The propellant is a mixture of butane and propane so be sure to have no open flame when using a Preval sprayer. Link for the MSDS - preval.com/wp-content/uploads/2018/10/Preval-Spray-Gun-Power-Unit-SDS-ENGLISH.pdf I have found that Preval sprayers work very well for small jobs, but the viscosity of what you are spraying is critical. I have sprayed water based finishes with Prevals and you really have to pay attention to the spray unit temperature there too. The only other downside of Preval sprayers is that they are expensive, but for a small job you may spend almost as much on solvents cleaning out a regular spray gun.

@kazeemadeleke7979 19 күн бұрын

Methyl ethyl ketone mek is okay

@matthewtaylor4956 Жыл бұрын

prolly nitrous in then can LOL party on Andy LOL

@walkertongdee Жыл бұрын

But you really need a gellcoat gun with a 2.5 mm. nozzle or a metal flake nozzle on a car spray gun, remember you want a GELL coat, not a thin paint-like finish... Only the Mono Styrene, if you don't have the wax gellcoat you can add melted paraffin wax to the styrene first. I make my own gellcoat from polly resin add pigment then add the melted wax to the styrene in the correct ratio and go from there. Not easy to get right the first time.If you really want to mix using the chemicals not the fancy costly additives learn by experimentation. This is better because then you will become a chemist and know WTH you are doing.😀

@Rick-tb4so Жыл бұрын

GELCOAT vs boat paint....

@exactodo Жыл бұрын

But the Moppie? 😭

@choimdachoim9491 Жыл бұрын

I just googled styrene: apparently bad stuff. I love those little sprayers. When I was da fix-it guy for 126 new homes I carried them with all the colors needed to touch-up after doing spot-repairs in drywall, trim and cabinetry. When sprayed for only a few seconds the cooling problem doesn't exist.