I just completely glassed an Extra 260 using the Poly U and followed the instructions from Completely Scale RC. There is no scraping at all doing it this way. The last two coats I mixed the poly about 50/50 with baby powder for A filler. I used 1/2 oz glass. Almost no extra weight added at all. After sanding it turned out to be A perfect finish and so smooth it is scarry. I''m ordering my paint today, Klass Kote.
I just went out and tried some covering on A test piece for you. All I use is Ultra Cote so I don''t know how Mono would work. The Ultra went down just fine but it was sort of like going over resin, if you kept the iron on one spot too long it felt sort of like it was melting or getting soft under the iron. It stuck like it was painted on after I let it cool for A while.
Camp, if you don''t use the water based Poly it flashes dry or cures so the set time is less then an hour between coats. I gave it three coats, let it cure over night then sanded. The two final coats with the filler I let set up over night between coats then sanded.
I would never go back to using resin or epoxy again. Other then the smell this is one great method of glassing.