tony tu, my cowl suffered the same non fuel proofing ... I had some lustrekote clear that I sprayed over the existing cowl. it is ok.. FYI, i emailed hanger9 and explained how unhappy i was with this, and no mention of it in the manual, they sent me a new cowl(fuel proofed), and i also told them i needed the decals too, they thru them in too. did not have to send in old one, so now i have a prestine spare...