I get the horrible feeling that we have been poking fun at somebody because of a language issue, and being as international a bunch as we are that should not have happened.
Kwm488, I'm curious why you spent a lot of money on a neck without doing more research. You could have asked questions about the showcase, about the amount of flame, about the FB radius or about the fret size, both here on the forum or with a small email to the Warmoth sales staff before buying the neck. It would have made your purchase much more fun because you would have been confident that you were getting what you wanted.
Things are done, so I suggest we try to be as helpful as we can be. You asked how to remove the spray paint from the frets. There are basically two ways. The first is to mask off the fretboard (use the blue masking tape that is less sticky) and use very fine steel wool on the frets. The second is to just leave it on. As soon as you play the paint will come off.