I'm a Newbie to this forum. Been doing most of my own repairs and light gun smithing as far as refinishing for years now but have something I've never had to do before. I'm trying to blacken a stainless slide. I just got a Ruger SR40 and ordered some of this stuff to try and get the slide black. I've done a pretty expensive search and have found very little about this but the guy at Caswell's said they sell the stuff to "tons" of gunsmiths... I'm hoping one of them is on this forum..... ??