Replacing the cab???

I will be replacing the cab (51 Chevy 3/4 ) sometime next week (with fingers crossed) and would like to do something with the underside to fortify it against rust and noise. I’ve thought about bedliner but don’t know how hard that would be to apply; I don’t have an air compressor so it would have to be applied via a brush. Is there a better treatment than bedliner? Does anyone have a suggestion as to what I can do? Also, any warnings/suggestions as I fit the cab back on?
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I've used bedliner on the bottom of a few truck cabs, works great! I used the Herculiner brand, nice and thick, sticks good. I scraped all the old nasty stuff off first, washed and dried it good, scuffed the bottom with 80 grit and applied 2 coats of Herculiner using a 2" brush....

As for reinstalling, I use a jig I built that mounts to the lift arm on my cherry picker. An A frame and a sling would be nice, just not enough ceiling room in my little shop..... I used a long alignment punch in the left front and right rear bolt holes, lowered the cab into position and put the mount cushions and bolt is, undo the lift and bolt 'er down.... Use self locking nylock nuts and a torque wrench so the loading is even and the bushings aren't totally compressed.

Other then that, have fun and be careful!!!! Them suckers are heavy!!!!!

Dave:
The cab, including the underside has been blasted and primed. Would it be necessary to sand etc. before applying the bedliner?

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Originally Posted by John Brian

Dave:
The cab, including the underside has been blasted and primed. Would it be necessary to sand etc. before applying the bedliner?

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It would probably be best to scuff the primer, maybe some 400 grit to get better adhesion. All you will need to do is sand enough to break the glaze off the top of the primer.... Should be enough to get good chemical and mechanical adhesion with some light sanding. The grit required depends on the primer used and how long it's been on there. Might be best to check the product sheet for the primer used and see what their recomendation is for sanding the primer prior to paint, then I'd think one grit more coarse would work just fine.

I'm with Dave on the bedliner. We used them on both T's and I had to remove some in one spot during the build and it was like taking concrete off.....very tough stuff. Super easy to apply with a brush or roller, but wear LOTS of protective clothing and cover your head up too, otherwise you will also be wearing bedliner for a few weeks to come. :LOL:

Don