Show us some pic's
As brummie says, parts can have battle scars or marks and be just fine
I have thought "what if I just" and have started to restore only to find that I am digging a bigger hole and mess it up in the end
peek can polish up some plastics ~ you need to test first
you can take it too far and have to keep going to you ruin it ? trust me been there
put up some pic's and lets see what can and shouldn't be done
cheers B