No worries MC! I just don't want to mislead ya. I guess technically the armor paint would be a body blush or fantasy part blush? I dunno lol! My client wanted the armor to look like copper with the olive green patina, rather than the blue-green that copper usually tarnishes to.
As for blades, do you mean craft knife blades or real knives, or dremel bits for cutting? Craft knives, I usually just use X Acto knives. You would probably know more about real knives than I do. For dremel bits, I use the sanding discs that came with my dremel, and you can get refills at most hardware stores that carry dremel parts. For more specialized bits, I have a link I can send you when I get home. I'm at work right now, posting from my phone, while I wait for my shift to start.
Tan dolls you usually don't want to sand for one of two reasons. The first is that some tan dolls, supposedly the pigment doesn't go all the way through. I've never seen this before but I think older tan dolls this was a problem for? I don't even know what companies were the ones... none of my tan/fantasy color dolls have this problem. The other reason is because it is very hard to sand a tan doll to the point that the scratches are no longer visible. However, I have successfully modded my light tan resinsoul fei's face, and really it just takes a lot of patience and time, is all. But it definitely can bedone.