I am wondering if anyone has tried putting a protective oil film on the frame and underside of their car. I'm not talking about undercoating but about a product like Lloyd's Fluid Film. The manufacturer claims this stuff helps protect metal from rust in marine and very salty environments. Even though I'm not driving the car in the winter, it has some surface rust starting underneath. It likely won't see a body off frame restoration for a number of years, and I am afraid the rust might become worse by then.

A gallon or two of this stuff (at about $75.00 per gallon) sprayed into all the nooks and crannies might help preserve the car until it comes apart some day.

I also have wondered if the oil might prevent paint from sticking in the future, or would sandblasting clean the metal adequately?

Any experience with this or opinions?

Thanks,
David

will this stuff stick to dirt? Oily dirt caked on an underbody isn't ideal either.

oils might not last that long. you would have to re apply it every year in my oppinion. i used to spray my used oil on frames and thigs that sat out side. it did not last long. but your other question, it will not prevent paint from sticking in the future, as long as it is de-greesed properly. sandblasting only removes crud... you still would need to wash it down with a degreaser. but then you would be fine and that is something you would need to do anyway.

They have special oil for that purpose which has the consistancy of soft candle wax. They use it up here in Canada to undercoat cars with but it has to be re-applied every year. I wouldn't think that you would have to re-apply it if it doesn't see road use. Eastwood sells a similar product for about $10 for 28oz.
They also use a thinner oil as well. The thinner oil seems like it is a thickened transmission oil. That stuff works well but drips everywhere for 2-3 days. I think any protection would help your car.
Steve

blacktop sealer mixed 75/25 with used diesel motor oil will keep her alive for awhile until restoration time.