My wife and I built Chesapeake 16 and 17 several years ago. We finished them in Interlux Perfection Clear Varnish (sprayed-3 coats). They were gorgeous until we began using them in the Florida Keys for the last three winters and getting the bottoms scraped up on the coral. The scrapes are not deep but some are to the glass cloth. My first thought was sand lightly to break the gloss on the varnish, fill scratches with epoxy, sand smooth and reapply varnish. Now that I am into it I was wondering if sanding out the scrapes more rigorously (some glass will be effected), filling with epoxy and reapplying varnish would provide a superior repair. I hesitate to sand through the glass in fear the repair will be more noticable, not to mention loosing strength. Any insight would be appreciated.