Answer: We use Z-Spar Captains 1015 for most finish coats. We have had great luck with the 2015 Flagship, heavier body and had nice gloss. There are several good quality long oil varnishes, the true marine varnish is the only product that will give you the rich color and durability. Some restorers are shooting clear coats over the traditional varnish for a tougher finish. Yes we block and buff varnish to remove dust as well as tipping strokes or following touch ups. There is thought that as the UV filters rise and cross during cure, you can damage the outer finish causing lost durability. We have not run long tests on this occurrence.