Can't help you on paint but I think you might want to sandblast BEFORE you put in you new interior. That stuff has a way of getting into everything regardless of how well its covered up.
26 year Navy vet (AWCS/NAC/AW)
71 Mach 1 M code, C-6, Standard interior, 64K miles, STILL awaiting restoration
72 Mach 1 Q code, C-6, Mach 1 interior, 137k miles, restored 2003