I use a three stage wet sand starting with a 500 then a 1000 and final 1200. Then I use Mcguires fine cut on a rotary with wool pad and then use Mcquires Polish with a dual action buffer. Presto boat looks like new. Do a lot of boat restorations and found this to be about the best process. Just be very careful when using 500 grit on first cut it takes a lot off.