It's NOT black anodizing, but it sure looks like it and can be done without disassembling parts. This is apparently usually used for gun parts, but I bought it to use to make scratches and wear on aluminum parts of old camera lenses look less disturbing. It works great. Clean the surface well with alcohol, then dab this stuff on with a Q-tip. They say wait 1 minute... more like wait a minute and then rub it in with the Q-tip some more if it hasn't blackened yet. Basically, the aluminum really needs to be raw; normal, not really visible, oxidation from a scratch having been there a while is enough to keep it from turning black for 2-3 passes of rub-and-wait with a Q-tip... but they do eventually turn, and the result is excellent. It appears to have no effect on the still-anodized portions of the metal. BTW, this does not make scratches go away -- it just makes them less visually distracting by making them black, whereas otherwise cleaning the external metal parts of a lens can actually make it look worse by making the once dirt-filled scratches look shiny new. I don't think this treatment would fool anyone into thinking the scratches were not there. In other words, it would be dishonest to use this in an attempt to fool people about condition and you'd probably get caught in the lie, so don't do that.Read full review
Verified purchase: Yes | Condition: New
Had to reapply several times, didn't work as expected. I suppose the fact that pistol lowers are made from a wide variety of aluminum alloys contributes to it's lack of performance in my case. I tried it on two different pistols that had some small areas of bright metal poking thru the factory coating. Normal nicks and dings.
Verified purchase: Yes | Condition: New
Very easy to use, for small areas, or scratches, use a q-tip. Clean the area with alcohol, wipe dry with a paper towel, and dab on the chemical. Let it work for one minute, then rinse with water, and dry. polish away any residue with extra-fine steel wool, let it set over night, and wipe with a lightly oiled cloth. looks like new, second or third coats refine the finish, if required.
Verified purchase: Yes | Condition: New
Black anodized aluminum cannot be blued like steel. Unlike black paint, Birchwood Casey Aluminum Black Touch Up works like cold bluing on steel. It stains the aluminum surface black and does a good job at touching up scratches. Afterwards put a coat of Renaissance Micro-Crystalline Wax Polish to blend in and enhance the repaired areas and to protect the finish.
Verified purchase: Yes | Condition: New
Product works as described. It makes aluminum black. But I would reserve it for small touch up jobs, as the finish isn't very durable. I did a sample on a piece of 6061 bar stock, and while it did produce a dark black finish, it was easily scratched off with my fingernail. And yes, I degreased it well and removed oxidation. I don't imagine this stuff would be very practical for high wear areas.
Verified purchase: Yes | Condition: New
This works very well for small touch ups where black is needed. No need to get out the paint can. Works great for small modifications where raw metal is exposed/
Verified purchase: Yes | Condition: New
I absolutely love this stuff. No ones perfect so from time to time you might do a little scratch in the black or driving a pin in and you see a little silver. Just apply a little of this and it’s back to new!!! A must even for those not building but accidentally bump things!
Verified purchase: Yes | Condition: New
I have been using Birchwood Casey Aluminum Black Liquid 3 OZ for at least 10 years. Yes, 1 bottle lasted that long. You must be careful and not contaminate it by using a clean Q tip each time you dip into the bottle. Works great with aluminum parts, highly recommend it.
Verified purchase: Yes | Condition: New
Very happy with how easy this was to use! A grey mirror like finish! But please read how to apply and get the best results!
Verified purchase: Yes | Condition: New
This stuff makes aluminum wheels look like vintage magnesium. Sand blast the wheel, wash, dry, then apply Aluminum Black liberally with a soaked sponge. Buff with pot scrubber pad while moist till desired look is achieved. Then wipe with clean cloth.......amazing!
Verified purchase: Yes | Condition: New
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