Substitute for Blacken-It

Bill Welch

With Blacken-It no longer around, here is a substitute:

Mind-boggling line of modeling finishing products.

Bill Welch

Jake Schaible

A bit pricey for what is obviously a copper selenium bath for cold temp blackening. 

Search for "
J-3498" or "Antique Black" on flea bay where you can get 2 ox bottles for ~$2 plus shipping.  Or spring for the stuff many gunsmiths use for touchup ... Birchwood Casey 3 oz bottle of "Brass Black" for ~$9. 

For best results, make sure parts are clean and oil free.