I thought heat shrinking door film was for hacks, then a guy in Reno showed me his 2 year old truck
I used to peel and stick every bumper film job dry because that is how the old guy who trained me did it at his place off Wells Avenue. Then a painter in Reno pulled his 2 year old truck in and the edges were perfect with zero lift, and he said he only ever used a heat gun and a wet slip. How many of you are shrinking your film before you lay it down, and does it hold up on curved bumpers past a year?
Wet slip and heat is the only way on curved bumpers if you want it to last. Dry peel and stick works fine on flat panels but the second you hit a compound curve the film fights you and lifts at the corners within months. Heat shrinking lets the film relax into the shape instead of stretching against it, which is why that Reno truck still looked right after two years. Just don't overdo the gun, once you cook the adhesive it never sticks right and you'll get the exact lifting you're trying to avoid. Tack it down at low heat first, work the curves slow, then post-heat the edges to lock them in.