I will follow with a few pics, and yes, I just signed up on this forum. Read a lot of great inputs here and am impressed. My first skin on frame was built in 1956 and followed with it’s destruction going down little Muskegon river into big M. My next was in 1961, a canoe, both without plans and old time canvas. I did do a few others, all pretty shaky, but fun. Also did two home built airplanes along the way with wood and poly skins shrunk on the frame, crashed one making kindling of Sitka spruce and foam LOL.
For those smarter than me, Look up weatherman 80, 8 0z with a tight weave, uncoated, but will not shrink. I use it for boat covering on my catamaran here in fl. Just painted a sample with 3 coats of oil base furniture paint and it is quite smooth and sealed using already thinned paint wife used for porch furniture. The weave is very tight and fabric seems strong. I will test it tomorrow.
Also some member suggested using micro-balloons mixed in paint to seal fabric. I just did a sample on large weave 10 glass and yes it works well for filling weave. I have a lot of experience building large boats and a few airplanes using composite glass, and epoxy and filling weave was paramount.
As an aside, I plan to build a few kayaks this summer when I return to Michigan, wanting to finish a 42 mile event starting in Ellsworth and ending in elk rapids. Being 82 with five joint replacements makes this exciting, so I need something lighter than my hobie. Now exercising hard as suggested here so I can use a sit in as I do have limitations.