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 Color coding for marine wiring What causes pinholes in TotalBoat TotalFair? What is the required dry time between coats of TotalBoat Wet Edge? Do I need to apply a primer over gelcoat before applying antifouling bottom paint? Which spray gun nozzle size should I use to apply gelcoat? Comments 0 comments Please sign in to leave a comment.