I can give some maybe helpful info, I did a similar project but used new leather inserts from redline goods. I tried using 3M headliner adhesive, which has a lot of tack, but takes too long to get a good hold when you're trying to keep the leather and foam molded to the door card. For the leather a...

Oh my foam is trashed so I’m using what came from redline. And thanks for the tips. I wouldn’t have thought about doing the inside of the cups then the walls as 2 steps to prevent tension. I’m probably going to use my steamer and steam the leather a little to get the shipping wrinkles out. This is ...