Has anyone used the New Hampshire oil undercoating?looking at so many any suggestions.

 

Is that where you coat the bottom of the truck with heating oil and drive up and down a dusty dirt road?

 

any serious answers

 

Personally, I wouldn't buy a truck that has had that done to the underside of it. You have to muck through it for any sort of maintenance or repair. It's not a permanent solution. Blah, blah, blah.

I used to be an F/A-18 mechanic, and spent my last year enlisted as a corrosion control technician. The only way to combat corrosion is to chemically treat the base metal then properly paint the surface. We would use a chromium based chemical conversion coating on aluminum, and a rust converter on steel. Both of those change the chemical properties of the base material to prevent corrosion. That is followed by primer, and paint. We used an epoxy based primer, and a polyurethane topcoat. Poly was necessary because the planes flex and stretch so much during flight. About once a year a plane would come in for touch up of the paint, every two or three years for a complete paint job, and any time a bird went in for a depot rebuild they would strip the entire plane to base material and repaint. The pilots would joke that the plane seemed faster, because it lost about ten layers of paint. This is also outside of any special circumstances. F-18's spend quite a bit of time on carriers. Nine months at sea does probably close to five years worth of damage to the plane.

There is only one fix for corrosion. Anything else is a band-aid solution.

 

Mr.Mrollings,thank you for your imput,well taken,I was ging to use LP7,ran out years ago,if I remember USAF used it in missle siloes,but my truck is 24 yrs old no rust anywhere,I have a frame off this winter part tags still on everything.where I live sooner or later I will have to do it injustes and use it in winter,just wanter to protect it as long as possiable.thanks again

 

By the sounds of it you have the truck apart? Not really sure, but if you have it together and want to slow down any rust issues:

I've used Fluid Film on my trucks. Yes, it can make it a mess but with Ohio salt I needed something to make the truck last. First truck I tried it on was my '87 F150. It was a southern truck and the frame was still clean and black. I sprayed it twice yearly and after 7 years the underneath was still rust free. Yes, oily, but no rust. Wheel lips were perfect.

I've done the '95 that I purchase about 2 yrs ago. Local truck, but stored winter. I make sure to get under the hood framework, front fenders, remove door panels, drill hole in wheelwell inner fender and spray above wheel lips, tailgate.

I'll put up with oily film as long as it keeps it from rotting out. For $35/gal, which gets me 4 coatings because I cut it about 50% with used motor oil.

As long as the seams are rust free, the oil gets in and seals out the salt/corrosion.

 

fluid film good stuff a thinned out version of cosmoline we used on machinery

 

I also use fluid film which has worked quite well in slowing corrosion. They salt the roads here in Idaho a minimum of three times daily 6 months of the yr.