I made the mistake of applying it to a couple of used bolts, thinking it would somehow miraculously dissolve the carbon. Didn't happen. It's working extremely well as a lubricant, doesn't run or burn off quickly and wipes off with the majority of carbon when you decide to clean it up. I haven't seen the same results with the bolt tail, but I think it's because I didn't remove 100% of the crud. I've never obsessed over it, but I do use a CatM4 tool. It knocks 90% of it off. I guess I'm going to have to get some abrasive pads. Maybe a little work now will go a long way with FC applied to the bare metal.

