FYI 3M also makes an adhesion promoter. It comes in a little packet that has a liquid and an applicator in it. That sh!t works AWESOME in conjunction with the 3M tape.

Looks like this



If the pic doesn't work here is an Amazon link
Amazon.com: 3M Scotch 4298 Adhesion Promoter (Sponge Applicator Packet): 2.5cc sponge applicator (Straw): Home Improvement

I have seen it at a few local auto shops.