Undercoating vs paint. I will seal all seams before painting. wondering if it is a goo idea to apply undercoating. Always heard undercoating traps moisture. Thoughts on this? Most undercoat restoration?:uhoh:
All of the cars I have worked on have had what's called sound deadner under the fenders and rear quarters and also in the driveshaft tunnel, as far as complete undercoating, thet was done at the dealership. The problem with undercoating, if it gets chipped it lets water get under and can let rust start.
I use rubber undercoating and like it. But mine doesn't see rain or bad weather. Depends on what your going to use your car for. Daily driver in rain snow etc then rust roofing is huge. Collectible muscle car not too worried about it.
i've seen a couple of cars done with spray on bedliner--does not disolve with solvent , is easy to clean ---can be tinted to match or contrast and adds sound deading ---a modern way for old cars
I did mine with 3m Body Shutz. Good stuff but cost a bit with the gun to apply it and 8 bottles to do entire car (fenders, wheel wells, undercarriage, inside doors, etc.). It does dissolve with solvent though. If I did it again, I think I might have tried the bedliner trick.