[John Firestone]

I like to clean the surfaces with a mild degreaser after I've mechanically cleaned and abraded them. I know a lot of the car's hard plastic is ABS/PC which can eventually crack if touched by some strong solvents. I clean it with isopropyl alcohol or stoddard solvent to be safe.

I will be curious how long the epoxy lasts. A lot of people won't use it on wood because wood's expansion and contraction can make the epoxy fail. I believe the door panels use some sort of medium density fiberboard, however, which expands quite a bit less with humidity.