Thanks guys. I'm not too concerned with originality, removal, or anything as the 66 Dart I'm building is just a street/strip hotrod. It's going to have a fuel cell and battery back there anyway. I'm just kinda brainstorming how to finish the trunk area and saw some stuff online about Raptor liner. It looks like pretty good/durable stuff. Hell, I may use it to to finish the rear floor pan/firewall area where the carpet doesn't reach since there won't be a rear seat.
This is my 1969 Dodge Polara that we did with tinted to match the exterior paint, then spatter paint over that (C-Bodies used spatter).
Although the floor didn't have sound deadener we chose to as this is a convertible and the floor wasn't perfect. View attachment 1716018201