Kinda off topic, but spray painting the frame bolts with some Blanca Busa Satin Black Rustolium works great. Masking tape the inside radius of the frame hole and around it and tape some sheets of newspaper over the bike. Wipe them with alcohol and spray. I sprayed my gas cap ring(off the bike) and a couple small parts.
I'm not a fan of frame plugs, or the bright bolts. The rattle can really makes them disapear. Great paint and color Saiid