RE: applying Top Flite Trim
If it is self adhesive [ sticky back ] then use a spray of water with some washing up liquid in it.[ Normal washing up concentration. ] spray on both the model and the trim.
You can move it around and work out any wrinkles. Leave it for 24 - 48 hrs and it will be stuck for good.
Seal the edges with fuel proofer. TEST BEFORE ON A SCRAP PIECE.