Well I started working on my hatch boards. Purchased a heat gun last week and waited until today to start. I was hoping that the heat gun would lift the old varnish and leave me with bare wood. Was I expecting too much? I guess so.The heat gun lifted only the top layer of the varnish. It came off easily, but left a heavy film behind. When trying to lift that, it turned dark. So I thought that I burnt the wood. After several hours with the heat gun, I decided to go to HD and get some stripper. So one of two boards is stripped but it took about 6 hours to do. Totally disappointed. I can tell you though, I will not varnish these or any boards on my boat. Way too much work. I'll stick with oil.Disappointment over.