The idea behind wax is to prolong the shine, not to restore it. Don't wait until your boat starts looking dull to wax it. If you keep gelcoat protected with a regular coat of carnuba wax, that new boat shine will last nearly forever.
Left it too long? Then a cut and wax is what you need. This process cuts the gelcoat back to a fresh gloss which eliminates the oxidation after which it is then finely polished an waxed to to bring up a deep long lasting shine.
We use polishers and quality wool and foam pads for the best results every time. You won't be disappointed