Quote Originally Posted by paul_c5x4 View Post
Selenium toner also works quite well for blackening brass, as does sulphide toners.
Yes, I've heard this but my attempts to do it weren't very successful. I don't know if it was an issue of concentration or pH or what. The model RR stuff is able to easily do a weathered black railroad locomotive finish on brass. It is a tad pricey, but so is toner!