Been there....
This last season, we repainted the deck to our Peterson 34 and suggest you do it in the offseason. Proper preparation is 90% of the job.1) Remove all deck hardware2) Sand deck smooth to 120 grit sandpaper (buy in bulk).3) Wipe down deck with Denatured Alcohol and Interlux #216(???).4) Tape the deck w/ blue masking tape.5) Prime with Interlux Pre-Kote using high quality 6 inch foam roller.6) Sand primer with 220 grit sandpaper.7) Apply second coat of Interlux Pre-Kote primer.8) Thoroughly wipe down the deck w/ Denatured Alcohol and Interlux #216(???).9) Roll one coat of Interlux Brightside paint with Flattening Agent and non-skid compound with a very high quality 7 inch 3/8" non-shedding roller. After many phone calls to Interlux and experimenting on flat platic, I used 3qts Brightside, 1 qt #2398 non-skid compound, and 1 qt flattening agent.10) Roll on second coat of paint after 24 hours11) Remove blue masking tape,12) Re-install the hardware.The boat is 34' long 11'6" wide and we used approx 3/4 gallons on Interlux Pre-Kote, 4 qts Interlux Brightside Seattle Grey, 1-1/3 qts #2398 non-skid finish, and 1 qt Flattening Agent. Interlux also makes Interdeck whaich is a pre-mixed non-skid pain, but you are limited in your color selection. You cannot put a two paint, ie Interlux Perfection, on top of a one part polyurethane paint, ie Interlux Brightside.