I am in the process of building a cedar-strip canoe. I am using Raka Epoxy. I have a little experience using epoxy. I built 2 strip kayaks 18 years ago (Mas epoxy) and a SUP last year (raka). The kayaks wet out very nice, did a sealer coat, everything went well, very clear, no glass seen under two fill coats, lots of varnish, still very nice after all these years. The Sup (raka) last year seemed to show a little of the cloth under certain light and angles. I chalked it up to maybe using glass I purchased from a internet company, thought maybe wasn't compatible. After researching, could not find any issues with Raka wetting out, Everybody seems very pleased with their product, so I went with them and this time I used their glass. I checked the calibration of the pumps they sent me, all looks accurate. My shop is in my basement, average 68 degrees, 35 percent humidity. Raka recommends a sealer coat so I did that, on the morning of application I warmed up epoxy and hardener in warm water bath (Trying to get best wet out possibility.) After wetting out glass i noticed the cloth looked like it did not wet out good, thought maybe will be better after 1st filler coat, still looked the same. I sent pictures to raka,,(they are very helpful), but were puzzled after quizzing about application process they stated all process seemed correct. I made a tough decision and spent many hours and a lot of sandpaper to sand it all off. They did send me new epoxy & glass. I have done 3 test panels and keep coming up with glass being visible (it is a little better than what I sanded off the canoe, but still there) My shop does have very bright LED shop lights right above canoe,,, but test panels show even in normal or outdoor light. I am attaching some pix. Any thoughts would be appreciated.