i have used the wrap on my trx450r.. I had a custom wrap made for the tank.. what i had to do was take off the tank, drain all the gas and let it sit for 10 days with the lid off (i put cheese cloth over the hole to keep the dirt out).. Then i took the wrap down to have it installed... they told me to let it sit for 4 days before filling it up with gas again.. I waited a week and it held up excellent.. It just got wore out from my kneepads rubbing against it.. i got the wrap redone and this time i had them put a clear layer over the wrap on the tank.. i think it was a 4 mil additional protection..
you might have to follow the above but have some little holes cut into to let it breathe.. the main thing is to let it air out before and after.. they say the tank actually soaks up the vapor and lets it out thru the plastic..