These are the best products of their kind I have found Instead of varnish, use Armada. Two coats last me a full season with one coat thereafter. It goes on about 10 times easier than varnish and doesn't have the orange color sikkens does. Any nicks, etc, are very easy to repair etc. Armada also makes a powder called Mightybright that removes mildew from anything on a boat. It got a great write up from DIY. Their boat soap also just got a big write-up in Boating magazine. For clear plastic windows, 210 is the best.