The Goodmark door skins and fenders work good but they sure do dent easy. Not like the originals that you get away with murder with that stiff metal. I found that you even have to be careful when sanding/stripping. I used a paint stripping tool to take off the primer that comes on the panel and actually put some small dents in it. You have to treat these panels like newer car panels. If you are used to bump and paint on newer cars then you will have no problem with the body work.... The panels flex when you block sand them so you can't push hard. Some have reported that the GM fenders that they are repopping have slight body line problems that take a few extra hours to straighten out.