djlyon,
Dont know what could be going on. I have found that waiting a week or 2 for curing time helps. Could that be it? Other than that, surface prep is the only other thing I can think of. I have a GP Decathalon thats about 8 years old, the cowl done with red and yellow. The only difference is that one was flown with 10%. The others are flown with 15%. Corsair with grey to feather the bottom to the top colors. Just recently a souped up twinstar, red, white, and blue on solartex. The only thing I did different was wait longer (due to weather) before applying fuel to it. The corsair and decathalon were monocote.
Edwin