I've done this b4 aswell but with single colour. Laquer is very much advised if you don't want paint to chip....ALSO use SPRAY PAINT ONLY!!Try a hand job and your asking for trouble...except if your a expert modeller.
Also if you want to refurb new racquets please remove grommets b4 hand.
If you want to fix paint chips i would advise 'Tammiya putty' (modelling cement based available in most modelling shops) and sand prior primming.
RAFAEL NADAL:I try my best always. I try to fight in every moment. The goal still was always the same: improve, no?