Do a web search for Completely Scale RC and read up on how he uses Poly U for glassing. I used the 1/2 oz glass and Poly U and it came out about the same weight as if I would have used Solartex covering, most of the weight gasses off as the Poly drys, about 80%. I then used thinned down Klass Kote paint in two colors. After that I would never go back to using resin or epoxy to glass again. I have another plane on my bench that I plan on glassing but this time I want to try the water based Poly U just to see how well it comes out so I can compare the two types of Poly. I like the LA series of engines and they are very light.