unless you are planning on shaving the frame and repainting i would lightly sand with 1000 grit and spray some clear over the frame - leaving the decals. i just finished my miyata that way and it looks great. the clear brings back the color in the decals and i think it give the bike more of a rat fink look. both my motobecane SS and puch road bike were stripped before i resurrected them and i wish they still had the original decals. don't f*** with history.