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There is tons of information on this subject on this site. I recommend you use the search function and you will find everything you need.

but quickly:

1. wet sanding when needed #400, 600, 1000, 1500, 2000 in that order
2. 3M marine rubbing compound, or 3M "Marine compound and finishing material"
3. 3M Finesset-it II for high gloss
4. good quality wax

All are expensive products, but the best you can buy. Don't waste you money on other brands. Always use a wool pad.

BW's website also has information on how to polish and maintain a Whaler. They say to stay away from bleach or abrasive containing cleaners (Soft Scrub, Bar Keepers Friend, etc.).