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If a spray on truck bed liner works so well at protecting the bed, has anyone thought to try using it to protect the underbody and key rust points? Would such a spray on liner also help to protect from rock chips for vehicles that go off road?
If a spray on truck bed liner works so well at protecting the bed, has anyone thought to try using it to protect the underbody and key rust points? Would such a spray on liner also help to protect from rock chips for vehicles that go off road?
Interesting thinking, Victim . . .
Not certain as to the performance and durability, however, I have seen a number of Jeeps at Car Shows as well as out and about with bed liner spray in the wheel / fender wells.
I have considered it for my 1986 CJ-7 but, so far . . . BIG CHICKEN. Not really a biggee as even after 30 years my Jeep still thinks going "off road" is driving into the garage.
I believe a lot of it has to do with maintenance/moving parts under the vehicle as well as drainage.
Doing a brake job or replacing a fuel line could be problematic if everything is covered with basically a rubber coating.
There's also a lot of nooks and crannies between external panels that need do be able to drain (think of stake pockets on the bed of the truck or drains at bottom of doors). If those got plugged/coated, you'll rust out other areas.
Instead, just undercoat your vehicle with oil or Fluid Film.
Well, for you youngsters here.
This has already been done in decades past.
It was called Rusty Jones and Ziebart.
Although the chemical formula may have changed somewhat, it is basically the same.
Hard black plastic. Yes, the spray in liners now come in colors.
Rusty Jones rustproofing came with a lifetime warranty. No rust for as long as you owned the vehicle.
Except - the vehicles did rust. And Rusty Jones went bankrupt.
Rusty Jones and Ziebart were hard black "plastic" sprayed all over underneath. Problem was that moisture got between the hard "plastic" and the metal. Then rust.
Today, for rust proofing people use a brand name product called Fluid Film. Or just plain "oil undercoating".
Fluid Film is a lanolin based product and is clear. Oil is usually bar and chain oil sprayed all over under vehicle and holes are drilled for hidden cavities - then plugged.
And for those who wish to jump in and state that the new car salesman stated that cars don't rust today because the manufacturers use better paint - Hogwash !
If you reside in Arizona, Texas, etc. well, probably you are not going to get much salt on roads and rust may not be an issue.
Florida - along the coast though - cars do rust with the salt in the air and high dew points.
Oh, and if it works so well, why isn't it a dealer option for these types of vehicles.
It is. The price is competitive with the aftermarket shops (the names of which escape me right now).
As for using as undercoating I don't think it would work too well. It's thick and not very malleable, which you'd need for the parts that flex.
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