I feel your pain...
Cant help with a Comp ARF Canopy from over here. But, are is some great threads on how to do this job properly. Worth a look.
http://www.rcuniverse.com/forum/m_93..._1/key_/tm.htm
http://www.rcuniverse.com/forum/m_95...tm.htm#9570986
I used the magnet technique to do my Bandit canopy, with SMALL beads or 30 min epoxy, and masked the canopy to prevent gue over spills. Works a treat.
Roger