The correct way is to apply it like tint. Use a mixture of water/soap like 90/10.
Spray the CP with the mixture then apply the vinyl and move it around to how you want it then push out the air bubbles and excess water. You can either let it dry on it's own or use a blow dryer to speed it up a bit but make sure you don't stay in one place too long because it's vinyl it will shrink.
That's the way I always do it ever since doing autobody. We had a bunch of cars that wanted decals and some that we had to redo because of people doing it wrong leaving air bubbles and making pinholes to get the air out, yuck.
