Birchwood Technologies Presto Black STEEL PC9 - versatile blackening solution for iron and steel alloys traditional patina steel blue and black oxide touch-up (8 oz)

tarnishes steel beautifully. very happy with how it turned out. I sealed it with satin lacquer and my sculpture looks incredible. super easy to use and kinda hard to mess up

Dang, this stuff works so fast you better not blink!! The beauty ring bolts in my bronco were kind of messed up from removing a couple times so bare metal was showing through the black. I poured some of this stuff on a bowl, dropped the button head torx bolts in and Shazam! No more silver was showing. Incredible. They look fantastic. One difference from the stock bolts is these come out with a matte black finish while the OEM Ford bolts have a shine on the black. I waxed these baby’s up and they look very, very close to the stock ones. Nobody would ever know. I got so punch happy I took my eyeglasses apart and threw the frames in but no go, this stuff only works in steel not aluminum. Oh well, can’t win ‘em all. This stuff works really well, if you need to blacken some steel hardware…get you some!

This worked very well for my tools. It contains Selinium, so please dispose of it properly. I've collected my wastewater for the next hazmat drop off. There's more involved than I can fit into a review, so I'll include a photo. It only works on steel (I knew that), so you can see/expect things like the stainless bolts stay shiny. I didn't even try the aluminum handles; I dismantled most of these and cleaned and treated them individually using a 1:9 distilled water solution in an ultrasonic tank (using an isolation jar for the solution). The only refinement post-oil (camelia in my case) will be a topical microcrystalline wax, but this is already a 'standard' coat and much better than what I started with. If you're doing a more direct brush-on application, then my experience may not apply to you.

It works, sorta. It turns the steel black but then rusts over brown even if you wipe it all off and dry it. Definitely not something I'd buy again.

Works great, works quick, just be sure to clean the surface really well. Any grease or oil with stop the reaction. I used isopropyl alcohol to clean my surface.