I also had problems with pitting when I followed Cogwheel's instructions. Thank you for taking the time to develop a rust solution that solves that issue! I'll give your method a go next time I blue some parts.

Amazing video, so simple to use, by comparison to other systems, and beautiful results… Thank you for sharing…

Great work Can't argue with the result. Will remember this for the next project

Definitely going to give this a go! Thanks Dan!

Wow thank a lot this is great job, Inspring me to keep alive my traditional metal work. #Love from Thailand

Good info. Thanks a lot for sharing this video. Looking forward to watching your other stuff.

Nicely done!

Great presentation, great presentation, thank you

If I may give you some advice. If you want a durable finish you must let the chemical do it’s work and that takes time. You must let the rust develop into a fuzz type texture before you neutralize the acid by boiling. No matter what chemical you use to induce rust it should only take you no more than 4 applications of the chemical to get a good dark blue finish. Magnetite (ferrous ferric oxide) is a blue black color. What you are doing in the bluing process is turning ferrous oxide into ferrous ferric oxide but you have to allow time for the ferrous oxide to develop. Take it from a gunsmith, you can’t hurry the process.

Excellent video

Nifty stuff, Dan! Thanks for sharing.

Greetings from Ireland. Many Thanks. William

The strenght of the finish is quite impressive. I had a custom bolt and axle for my scooter made and after 3 years in the rain and salt its holding up almost perfectly. (never oiled it again)

I have no idea what whey oil is but for anyone interested in rustling bluing used motor oil or small engine oil are good choice's. You don't want to use oil that has detergents in it because it'll take the finish off before it has a chance to set. Also kerosene is a good option. When applying your bluing solution you want to try to apply a thin film and don't overlap on the application for best results.

muito obrigado!

Hi Dan. Great video thanks. I would love to try this on some home made tooling. What strength of hydrogen peroxide solution do I need? I think I can access 3, 6, 9 or 12% at our local hair dressing supply shop. Thanks, Craig

Thanks for nice video. What is the abrasion resistance?

Thank you for this great information. May I know what percentage of hydrogen peroxide you used?

Keeping peroxide in an Amaretto bottle is funny, long as you dont mix up !

That poor bug stuck under the lid at 9:00 I hope he's okay :(

What grit did you sand to before starting the bluing process. The result looks really nice and so much quicker than slow rust bluing.

What times do you recommend,. Between coating and boiling, between boiling and carding, and between carding and the next coat? It would seem applying a next coat while the metal is warm would be best but I would like clarification. Thanks. 👍

1/16 cup is a tablespoon if anyone wants to save the conversion chart.

If we can't have access to a tank big enough for a rifle barrel would steaming it from an apparatus used for rust bluing be just as good as boiling it with your mixture?

Thanks for this vid! I've been looking for a way to blue gun parts in the home shop without buying hard to get chemicals or an advanced ventilation set up, I'm going to give this a try. I'm not sure if you'll have the answer to this or not but would a black oxide coating like this make a good priming coat for finishes like Armacoat or Duracoat? Or do you know of anyone who's tried this? Thanks!

Nice black. Is this finish a rust preventative?

Does boiling in the pot wreak it or stain it / also how long will it stop rusting after making it rust - ok sounds weird with the black coating thanks Kevin

Do you use distilled water to boil the part in or just tap water? And do you use typical iodized table salt or non-iodized salt?

Thanks for sharing the non-aggressive method. I will take it into my workshop. However, I have one query. What % of Hydrogen Peroxide is used 10% or 30% etc?

distilled vinegar can be of various percentages, what percentage vinegar are you using?

interesting. I have always used commercial solutions for 'blueing' steel, but I like this homemade action. Have you tried dipping the part in the solution and then wiping it off?

hi, would this method work with any acids that make the steel rust? thx steve

Thanks Dan, can I change the oil with nabaty oil or coconut oil?

I’d mark the bottle saying it contains rust bluing solution. Although not toxic, you still don’t want someone sneaking a drink.🙂

Great video Dan! When you heat the metal are you using a heat gun or boiling the metal in water before applying the darking solution? How durable is this finish. Would it work on a gun barrel?

Hi, thanks for the video. 2 questions 1- I don't have a carding wheel what should I use? 2- If anyone already tested, what is the durability of the blueing on a heavily used piece. thanks

You gotta label that liquor bottle bub

what is the name of the wheel your using to buff

Hi, I was wondering if anyone could assist me. I'm trying this method to blue a pistol magazine. The issue I'm having is with an uneven first layer, when I apply the solution it doesn't stick as well, instead of forming a "film" there are areas where the steel seems to "repel" it (kinda like water acts on steel). If I do multiple passes I do get the whole piece covered, whoever not evenly. Is this due to not heating the part first? Bad part cleaning? Or perhaps my solution isn't in the right proportions?

Why is it necessary to use the wire wheel in between coatings? Are you not just removing the coating you've just applied by doing this? If you're just abrading the surface for the next coating, wouldn't a light sanding with high grit water paper do the job? (Not everyone has access to a variable speed lathe)

Does this method change the dimensions of the part?

How do you boil a rifle barrel

Remind me not to do shots in your garage....lol

Using a heat gun is definitely not a way I've seen before, I've seen people using a box qnd a heater before which is a slower way but probably better since you aren't blowing it with a blow dryer. Still a good look the way you went with. Just not quite the same as an actual rust blue on the piece.

so i wonder: can you just boil it directly in the hydrogen peroxide solution?

What was the amount of water you used?

What about complex shapes? Like an AK barrel?

If you brought the metal up to a mirror finish, will this process produce a black mirror finish??

Why do you wipe it? Why not just dunk it and then boil

What If you want a high gloss finish

Why can't i get a blue that dark on stuff i do? Too much polishing?

It's easier to use a 2%-5% salammoniac + distilled water solution this is the easiest method they used to reblue military firearms plus it's cheaper

can you let the parts sit overnite?

What’s a carting wheel?

Where do you get whale oil??? Stavros

Great! Thank you, I want to try this, but there are two words you use that I am not familiar with (I only speak English ;-)) - the one that seems to refer to the rotating item on the lathe (which seems to be a buffing wheel or similar) and sounds like you are saying cart (or kart), and the other that refers to the oil and sounds like whale (surely no one has access to whale oil these days?), if you (or anybody) can enlighten me as to what they really are I would be forever grateful).

What type of steel is that not stainless is it?

rust bluing solution ?????

1/16 cup = 1 Tablespoon

Can you write the inggridient bro

Hydrogen peroxide solution comes in different strengths 3%, 6%....consumer available Higher grades are restricted What grade are you using?

Good video overshadowed by the storage of toxic chemicals in a liquor bottle, especially one with the original jabelling - That's an absolute NO NO. I personlly knew a teen who died drinking from a clearly labled liquor bottle.