Sand all the molding lines off the body. Finish off with 1200grit paper
Prime the body with 2-3 coats of Tamiya Primer. Leave for 5-6 days
Then paint the body with 1 light coat of finish
A second about 10 minutes later
A third about another 10 minutes later for the last and final coat.
Leave for 7-10 days to harden up the paint
Polish and wax it.