Hello Blackbeard! I did a backbox restore on a Funhouse. I agree with the people recommending the wet method, but I had an important learning experience wit using rapid tac/wet method - Wait to cut the decal edges until after it dries. I found it really difficult (even with a sharp blade) to cut a perfect straight line when it was still wet from rapidtack. This was because the edge was prone to lifting a little while I was trying to cut it. If you get it down clean with the squeegee with no bubbles or issues, walk away for a few hours, let it set up, then cut the edges.

Or just do the dry method. But I was very intimidated by this and wanted the margin of error that the wet method offers.

I also strongly recommend priming it before hand and using 320 grit to sand down the primer. then use a tac cloth to pick up any sanding debris. It created a really perfect clean flat surface for the decal.