What about \"Oiling\"?? Since the 84 went in the body shop, I've been trying to figure out the best way to treat the undercarriage. There is some light surface rust forming on the underneath of the floorboards in different spots, and on the frame, too. I was looking at Por-15, but a friend had a suggestion that I'd never heard of. He claimed lots of people use used oil and spray it in a nice, thin even coat over all the already rusty surfaces as well as those that are prone to rust. Apparently it stops rust dead and only has to be redone every few years. It made sense to me, as I've seen lots of old oil drippers with less rust underneath than mine. so I phoned the body shop and asked about it, and my bodyman says "yeah, we do it on lots of vehicles.......works good!!!" So my question is: Has anybody ever heard of this procedure? Or even had it done? And, if so, how did it work? BTW, he said he'd only charge me $100 since he was already getting my business. Good deal or not?