Here are the steps I took to restore my old sun rotted door panels. As long as the panels are not rotted all the way through, they can be restored. This process works on all plastic interior panels.
1) remove any trim or cloth inserts getting down to just the plastic door panel
2) save the retention clips and flatten them back out with pliers for reuse as I’m not sure how easy they are to replace
3) wet rub off all the sun rotted dead plastic using steel wool to get down to good plastic
4) wash the panel thoroughly with soap and water and a scrub brush
5) clean the panel with an alcohol based cleaner. I used Color Bond Pro Tech Surface cleaner
6) lightly spray the panel with Bulldog Adhesion Promoter
7) apply three light coats of SEM Texture Coating. Lighter is better. Don’t go too heavy.
I put it on the smooth and textured surfaces without masking to get an even overall appearance
8) lightly sand the entire panel with 1200 grit paper. Light is key.
9) wash with soap and water
10) apply a light coat of Bulldog Adhesion Promoter
11) paint in your color with a plastic/vinyl paint. I used SEM 4002 Canyon Red and it took two cans per panel to get a good coverage with an OEM look
12) reassemble panels
13) follow the directions on the can for all of the products I listed above
14) I found the fabric at SMS Fabric
15) you can clean and paint the switch plates and speaker grills the same way with these same products but they shouldn’t need the texture coating
16) you can clean and paint the arm rests and all other plastic or vinyl interior pieces using these same products Sent from my iPhone
Nick Sachse 1986 F150 5.0 EFI AOD XLT Lariat 4x4 Styleside Single Cab Long Bed