I threaded a pile of pistol barrels and made/knurled the thread protectors for a dealer friend. I used "Oxpho Blue" for the thread protectors by placing a quantity in a plastic container and submerged the thread protectors in it. Good even color resulted. Instructions say degreasing is not necessary, but I always clean with acetone. When I make screws/pins I do the same thing. Don't put any parts into the main container, it will cloud the solution. A late friend( 22 rifle/shotgun gunsmith)did really nice work with it by going over and over it, until satisfied. It took as long to do a complete rifle as it takes me for slow rust.

Edited by Der Ami (05/15/19 04:40 PM)