how do i get rid of sandpaper marks
For headstocks I use the meguiar's series of compounds. Stew mac used to have them but now I'm not sure if they have private label stuff or not. Auto parts stores are sure to have the meguiar's. The Ibanez finish is so hard that I use the "paint cleaner" one first. It is very aggressive, but the buffing granules break down quickly, so you get a good initial buff without leaving scratches behind from the coarseness of the compound. Then you just go up the ladder until you are at the waxy polish stuff. Unless you do something to stop it, you will have an indentation where your logo was. To fix that, you could fill like Brian said, or you could block sand the whole headstock with 400 first until it all becomes level again. I would put the logo on after sanding with 400 and spray clear coats over it until there was enough to wetsand it flat over the logo. Btw, I just got some clear transfer paper for the printer, I'll try it out in the next month or so.