Birchwood Casey Brass Black Metal Finish, 3-Ounce

Have used on clean brass. Gives good pitch black if the surface is cleaned nicely. After some months it was not giving good black. But patches. Especially in monsoon so moisture and dust if avoided, it works great

I compare my need for this product to someone giving themselves a bad hair colour job, where after they've made the mistake and have horrible yellow hair, they are trying desperately to find a way to bring it back to its original colour! In my case, I have an old brass door knocker that can be dated loosely between 1945-1975 (LOL). I'm in the process of updating my front entrance door and thought, hey after 25 years maybe there's something nice under this black stuff. I send a picture to my brother and he said, it could be brass. Without thinking, I took my SOS pad and in seconds was able to remove the black to reveal brass thinking I found treasure (and sent him the photo of it partially sanded and then... about 30 seconds later I was like... "OMG, now I've done it! I really want it blackened! What am I going to do?!" So to the internet and Amazon I went so fix my mess. I figured someone must have discovered a way to do it by now and someone did! Birchwood Casey. This product worked like a charm! I actual found it is more commonly used on guns (gasp), but that it can work on any brass metal object. Here's how I did it. - I first wiped down the knocker with acetone to remove any residue. - I then soaked cotton pads, wiped the surface with Brass Black let sit for about 2 minutes and continued to applied several applications, while letting in dry in between each one. - I let the whole thing dry for about 5 more minutes then washed under water. A tiny bit of black came off but nothing notable. - I held it up on my door to take a photo and show you how well it worked! Take a look at the photos! It's actually funny how I have a picture of each stage as I was so excited, full or regret, then excited again. If you have questions, be sure to ask a question vs. comment as Amazon doesn't send me messages when comments are left.

Worked great

Works just fine on copper and has a nice dark black finish to it. The finish is slightly fragile on plain copper itself so if this is an area of heavy wear you might want to go for multiple coats but my primary use for this is aging and highlighting engravings so it's overall perfect for what I need. I say fragile but even with repeated go-overs with steel wool (for contrast) it will still leave an obvious dark finish, so it's penetrating pretty well Very, very reactive and will blacken in a couple moments. This is not a gradual aging like you get from some products where it takes an hour or two to get the full effect. Like with any bluing/blacking solution surface prep is absolutely critical, so if you're running into finish problems then make sure of how you're prepping your piece. Oils will interfere with the process so a good rubdown with acetone or some kind of alcohol will take care of that. Even surface finish will lead to a consistent black.

Used it on laser-engraved coins. It gave a great finished look.

Works after several applications.