I have just applied the 4th coat of epoxy to my Petrel. I have wet sanded to 220 between coats and rinsed and dried before reapplying. For the most part, the weave is covered, except the keel, where I used 6" tape and still have some filling to do. With each coat, I see progress, but I keep getting dimples in the epoxy. Any hints or suggestions would be much appreciated.