It's getting flipping crazy. Try your local gas stations convenience stores. Anywhere. Isopropyl alcohol is in huge demand right now. Granger is backordered until August
I used to order a 55-gallon drum of 99.9 isopropyl. Can not do that where I work now. They want everything to be negative charged and safe. Slackers beware! I got two gallons left of my own personal.
I know these are hard times. If you have Walgreens or CVS. Kroger maybe even Safeway. Call in advance. Let them know what you do for a living. They will save it for you and give it to you. Grainger has isopropyl in 1 gallon.
You might be giving the film too much heat too soon. Really take your time. Shape the lower before the crease. Also, maybe try heating under the film and on top. Be gentle. Take your time.
Cool, bro. Several years ago I was cruising up there once a week. To Silverthorne at the GMC Cadillac dealership. Closed now . Lot of clear bra work up there