Burdar, I did what you suggested with some other interior pieces that had light scratches in them and you are correct, they virtually disappeared after being painted with SEM paint. However, the driver's seat back was so bad I tried to fix it by filling and then sanding and painting. Now the scratches gouges don't show, but it is very obvious where the repairs were made due to the lack of texture. Don't know which is worse.
Filmsurgeon, good links. Thanks. I've going to try something and if that doesn't work I'll try one of those two links. That's a great idea. Thanks.