cars with painted undersides are pretty. Gorgeous in fact. BUT Chrysler products were not built this way. I have always opted to leave the factory sound deadening, or replace it after the resto.
Why??
because I do not want to spend an entire day after driving the car to clean the underside, or god forbid, get caught in the rain, NOW you have a major mess.
Don't get me wrong, my underside is detailed very nicely. New stainless brake lines, fuel line, Rear end and leafs painted nicely, front suspension also highly detailed, but as far as floorpans, and wheel houses, hey, just sounddeadening.,, and it looks very nice. And Easy to Clean!!!