There have been great debates about seal coating. The seal coat is supposed to make a lighter-weight, more-even-colored boat. Not seal coating helps avoid floating the glass. I seal coat, and the next day scrape the hard fuzz and ay bumps off with a cabinet scraper and glass with slow hardener. The day after glassing I add four fill coats with fast hardener with two hours between coats. I leave the hull/deck on the internal forms until the epoxy cures.

Dave