I've recovered an Avid Flyer and a Kitfox 4 and in each case used about 3 gallons of each, poly brush, poly spray, and poly tone. I did put one less coat of poly spray on the bottom of the fuselage and wings and tail feathers. If I remember right, I used 2 cross coats of poly spray, and couldn't see a light bulb held inside the fuselage. One thing to bear in mind, is poly fibre system should last for many, many years on a plane that sits outside. I knew mine would always be in a hangar when it's not out flying, and so UV is far less of a problem in my case. Another thing is I wasn't worried about completely filling the weave, just getting a even paint job with no light spots. Here is the Avid Flyer. Jim Chuk