I just had my RVan "portered" aka washed, waxed, detailed. 1992 GMC Vandura I bought in 2011. Dont know if it was ever washed and waxed. They were sorta in shock when I drove in and they kept saying "badly oxidized". I got it back in fabulous condition inside and out. Not cheap, $300. From now on it will be $100 wash and wax (all by hand)couple times a year. I got it cleaned up before I left it at my auto body guy (he works out of the garage behind his house) so he could see what was actually in need of repair, like the rust area down near the step on passenger side, other spots and chipped paint.