Birchwood Technologies Presto Black STEEL PC9 - versatile blackening solution for iron and steel alloys traditional patina, blue and black oxide touch-up (1 gallon)

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!

Worked as described! Would definitely recommend and buy again!

I used this to darken a cold blue finish....that turned out actually bright blue. Got it to more of a really dark gray color. SO, for my purpose this did ok. It goes on very "Splotchy" but smooths out over multiple applications if you APPLY it lightly with 000 steel wool as the only applicator.

It is exactly what I ordered and does exactly what is described.

Worked very well. I sand blasted my Jeep’s bumper hardware first per directions and the black oxide solution worked quickly to attach to all the nuts, bolts and washers I soaked in it. I then sealed them as recommended by soaking in WD40. Only time will tell how the coating holds up to the elements but I’m optimistic based on the thickness of the coating.

Good product

easy to apply but does not work properly and does not protect against oxidation

Not bad for touchups, but for larger pieces, there are better products. Overall, easy to use and economical.