I hose all my vehicles down with a paint sprayer filled with used motor oil. Once you drive and get crap to stick to it, it lasts quite a while before it washes off. Definitely adds some life to the vehicle, for sure. I certainly wouldn't pay money do to this - I've got like 100 gallons of used oil here I need to get rid of.
Yeah, none of the old Toyota pickups or cars around here anymore. Last I saw of any of them was in the mid 90's - fenders, trunk lids, and bed rails flapping in the wind with rot. Lots of them used to be in the junkyards too in similar condition. You'll never see one smoking though. Remember the Chrysler mini vans from the 80's? Don't think there was one on the road that DIDN'T smoke after 25k miles ...
Up here you can't find anything older than 10 years in the junkyards now.
The scrap run of '08 wiped most of 'em out.