There was a compoany that used to do a "restoration" of sorts but it was an obvious fix.

They would sand down the plastic and vacuum form new vinyl to the panel.

It was obvious it was not OEM, but it did look really good. Good enough that anyone who didn't know what OEM looked like up close wouldn't know they were not original. IMHO

EDIT

Just dashes is the company. Thank you TJP for the info.