smac wrote:
I've got a 1977 car here with some kind of hard foam material stuck in place on the big panels (roof, doors). Anyone know if this is from the factory? Is it any good? Just wondering whether to rip/chip (it's gone kinda crumbly) it off, or stick something (dynamat etc) over the top. I'm guessing having something between any new dynamat and the panel would reduce it's effectiveness at damping panel vibration.
This stuff isn't foil backed, it's about 2mm thick, crumbles off rather than peels. Has holes kinda looks like those old acoustic tiles.
Factory was brown matting I believe, kinda looked like hay, short strands of this stuff all webbed together and stuck on, PITA to take off. i'd say yours isn't factory, but not certain.
People have had success freezing the stuff and then chipping it off, as it's usually made from tar or something like tar.
I think dynamat over the top will be less 'successful' and I'd try and get the stuff off. Supercrap sell a spray that smells of orange, and it actually has citrus extract in it and it works really good at removing adhesives, I used it on my roof and we use it at work to get sticky stuff off computer screens and stuff. Not sure how it would go on this stuff though, but could be worth a thought.