Hi all, I'm wanting to paint my boat,but Ineed alittle info. Spraying is out of the question, so I need other options. I heard the term "roll and tip" I'm not sure what this method is. I assume all I need is to wet sand and clean. It needs alittle patch work ( scratches and pits) and at the bottom of the hull ( where it meets the trailer roller) the fiberglass is completely exposed. Is there any special prep to be done on this? Any in put would be great. Thanks