I was able to get a set of wheel moldings that are in very good shape for my 68. When I cleaned them off, I noticed that it looks like some form of sealant was put inside the moldings. When I thought about it, it made sense. Since these are areas prone to holding moisture and rust, a sealant/caulking would help keep water out. Then I thought that maybe this sealant would also help keep moisture in. Has anyone else tried to use a sealant or heard of sealants being used?