Birchwood CaseyFast-Acting Brass Black Metal Finish to Blacken or Antique Brass, Copper, Bronze Parts

Work great on blacking brass parts on my man of war ship

Works exactly as expected. Easy to use

The media could not be loaded. "Your results may vary." Keep that in mind. I just received this yesterday and have only used this for the single highly specific purpose intended.I used this to chemically blacken the head of soft "yellow" brass wood screws used in a 1946 Baldwin grand Piano. I believe these screws were all originally blackened in a similar manner with all but one being "polished away" either by mere ordinary use or "mistake" as "brass should be "shiny."See video for clues to the mystery and see if you agree. The only audio is the piano itself.Sorry that the video ends before the top is installed but I'm waiting on some new rubber "mushrooms" as the old ones are so hard and deformed that they actually deformed the wood (and finish) below--fortunately I could save and "camouflage" the finish damage but of course the wood damage is permanent.Some things I discovered that won't be apparent from the video:1) Timing is critical. About one minute as per label instructions seems right.2) Additional "coats" only help to a point. About three seems the max before you hit a point where it seems nothing really changes--some parts "more black" but others "less black." Again--this seems to be very much an "art."3) YOU CANNOT DIP!! It simply won't work! And DEFINITELY don't dip in the full bottle! You would contaminate the entire EXPENSIVE thing! If you MUST attempt to dip then pour a small amount into an appropriately shaped small container!4) Too much of the product just eats away at the coating you've put on.5) Too little of the product and nothing really happens.6) The rim around the screw head is VERY, VERY difficult to cover fully.7) Be CERTAIN to use steel wood in the preparation stage!8) The instructions are excellent and should be generally followed step=by-step and sort of to the letter. That said, while rinsing is absolutely mandatory, blotting dry with microfiber is fine for something that doesn't need "buffing" for any sort of appearance when you just want it to "disappear" to begin with...9) While I have every reason to suspect that this piano left the factory with screw heads "finished" in much this manner perhaps using the exact same sort of chemical formulation know that as produced it is highly fugitive in that you can even "polish" it away with your fingers. This "problem" can be "fixed" lets say by using a couple very light coats of gloss spray lacquer. Some but not all brass on this piano (think hinges) were originally lacquered--very nicely--nicely enough that I just refinished an excellent existing lacquer finish on brass during the restoration--it never saw any "brass polish." The screws used however had never I'm sure been lacquered. Baldwin was sort of the "Chevrolet" maker of US Pianos compared to a fancy name that likely would have gone the extra mile let's say to lacquer those screw heads...but even then it could be polished away...

Used this to blacken brass pieces on a model ship I am building, works great.

I used this as an experiment on an old solid brass round door knob that had been scratched and old looking for 20 years. I had to remove the last scraps of lacquer first, and then followed the directions and immersed the knob. It turned the color I was hoping, the gorgeous oiled bronze look which is what I was going for, and why I give the product 5 stars.Unfortunately some of the dark coloring has rubbed off in odd, patchy spots on the edge of the round knob, but I really can't say if it was my fault for rushing through the process or the products fault, or perhaps brass that is not evenly mixed.I have more knobs and other solid brass items, so will experiment with them and see if there is a better process and update this as I learn more.By the way, I also bought the oil rubbed bronze spray paint (metallic) and sprayed another brass knob, the kind with the handle to the side instead of round. It is under some use on a bedroom door and has held up really well, and looks fine, but no where near the patina this gives.Despite that, I will likely paint the majority of my knobs because it seems silly to replace them to update my house look when I can easily paint them, thus saving more stuff to be dumped in the dump and environment. I will use this product on my front door knob and plate as I like this look better, but cleaning off the lacquer was more arduous than I liked, as I tried rubbing alcohol (worked on one know, not the other), mineral spirits ( worked on the other knob) and lacquer thinner (helped but did not work well). Apparently finishes have changed over the years and trying to figure out what to use to remove the stuff as well as the actual scrubbing is a bit more energy than I want to do for EACH knob, thus the paint on knobs that are not easily seen. If any one has any ideas on how to make that removal easier, I would love to hear about it.

Worked as expected. Great value

Item as described. Packaging adequate.

It produces more of a Grey color!