Is sanding between coats required when applying Pettit Hydrocoat? Eric Boudreau January 15, 2021 14:28 Updated There is no requirement to sand between coats when applying Pettit Hydrocoat. There is also no time limitation, beyond the minimum overcoat time that the product specifies. Related articles Which bottom paint is right for my boat? Can I apply bottom paint on bare fiberglass? Color coding for marine wiring Top bottom paint FAQs Common reasons for antifouling paint failure Comments 0 comments Please sign in to leave a comment.