stealth ink is not really a classic ink, it etches into the surface as acid does and it's fokin hard to buff it, I bought 2 bottles of it the other day in Brno,Czech Republic, it's deadly, I don't wanna tag with anything else since I've tried this shit, I rate it 5/5, just watch out so that it doesn't get on ur hands, u can't see it,it just itches as fok and it's really hard to get it off ur hands