If you are worried about using fine wet and dry paper the you could always try mildly abrasive polish like original T-cut. Need to put a piece of flat plastic under the polishing cloth so you can follow the body contours and not rub a dip in the paintwork. The T-cut does not leave a residue so if needed you can put more paint on or lacquer without further cleaning. It also avoids the need for a mechanical polisher.
