Someone mentioned awhile back that body metal changes shape when exposed to the hot sun. I expect that’s true, especially aluminum. Now that I’ve got my OTS door skins flat and drum tight I’m wondering how to keep them that way, or at least mitigate the effects of temperature during our hot summer days.
Seems to me a thin, rigid sheet material of some kind bonded to the inside of the door would help to stabilise the skin, keep it flatter in the sun. It would have to be a material that’s fairly light weight, that will absorb and dissipate heat without softening or expanding.
My doors originally had an 1/8" thick tar paper like material bonded to the inside, but I think this was more for sound deadening than stabilisation.
Has anyone explored this?