I am going to be replacing the floors and rockers on my '50 chevy soon and have been thinking about how to seal them up after installation. My question is if it would be a good idea to epoxy prime all the braces, panels, inner and outer rockers before installation and welding them in. Obviously, I would sand off the primer in areas where I would weld, but I'd like to get epoxy primer on the pieces that would be otherwise inaccessible. All advice is appreciated. Posted using the Full Custom H.A.M.B. App!
Absolutely! It would be foolish not to. Clean and sand, then apply the epoxy with a brush or spray gun. Clean off 1/2" from weld sites. Use weld thru primer on the area you cleaned (weld sites) only if it's a lap joint. Cavity wax when your all done. It will out last you!
Thanks. Why use weld through primer only for lap joints. I plan on **** welding as much as possible. Posted using the Full Custom H.A.M.B. App!
Weld thru has very poor adhesion. It only works if "trapped" between two panels. It's often misused as a coating inside rockers and such, instead of epoxy.
If you're **** welding, just paint it afterwards, on your joints where the floor overlays the bracing, use a rosette \ plug weld with the panels coated in weld thru. I still take an awl and scratch off the weld thru in the rosette thru hole to strike an arc.
If the access to the panels is limited, then they should be primed beforehand. But if the panels can be accessed for primer after installation there's really no reason to pre prime them, and then grind off the edges. I brush prime a lot of floor panels and undercarriage, and never prime the pieces ahead of installation unless they can't be done later.
Great advice so far. Thanks. I think I will prime tHe inside of the floor braces and rockers and then spray the rest once complete. Posted using the Full Custom H.A.M.B. App!
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