I just finished sanding my 285 (1987) down to the gell coat because of a very bad paint flaking problem. The "hull expert" at the yard suggested just taking it all the way down and starting over. I've been fighting the flaking paint problem for three years. Anyway it was a big job of scraping and sanding, as anyone who has done it very well knows. My question is about a few samll areas where I sanded through the gel to expose the fiberglass surface. The smallest about the size of a dime to one or two the size of a silver dollar. Mostly in areas where it was hard to see and control the sander, like under the aft end around the prop. I didn't burn in a big hole, I just exposed the glass. I'm going to barrier coat (4 to 5 coats) and then apply a bottom paint. Would the barrier coat be enough protection for the "burn through" areas or do I need to do something else before applying the barrier coat?