I received my tower trainer to replace the one that I crashed and lost[

] Before I put it togehter and fly I want to spray it with a clear coat of Top Flite spray. Should I lightly go over the covering with some 400 grit sandpaper, wipe clean and spray? Is the covering on the tower trainer compatiable with the Top Flite spray. I think this would keep all of the trim from coming up and getting fuel under it. Thanks for your input.
chopper man