Where I slip my boat, bottom painting is a must. In two week, grass 2 feet long will grow on the sunny side of the boat. Within 3 weeks of splash, the bottom will be mostly black from growth. So we bottom paint.... I have done many boats for both me and for friends. My last boat, and this one, I started doing a no-sand installation method. It worked perfect last boat, and it should again on this boat. I do not like the no-sand chemical bond method - I have seen those fail. So my method is to utilize a chemical etch and degloss by scrubbing with a coarse scotchbrite pad. I use Sea Hawk S90 scrub chemical. It is similar to orange pumice GoJo hand cleaner, but industrial strength. Roll it on, then scrub like mad with a maroon scotchbrite pad. It deglosses and dewaxes the surface very effectively while maintaining a new hull warranty by not sanding. Wash with water, then a few wipe downs with wax and grease remover solvent and it is good to go. I switched it up this year and went with Pettit's new water based epoxy called H2 Prime. It is a 2 part high solids epoxy, but water based for low odor and easy clean up. Very nice to use, complete coverage in 2 coats, and easy clean up. This year I also switched paints. I normally use Biocop TF in my area, but wanted to try a slightly "faster" paint. I went with Hydrocoat SR water based paint for the added biocide. It did not roll out as easily as a solvent based paint, but still not bad, and reasonably smooth. It needed thinned with water or it was a bear to roll out. Well, here is the final result. I will post back after some time in the water how it is performing.