Well, it has been something like 6 years since I got my car on the road so I wondered about giving it a lick of paint. What have people used to paint the inside
of the shell? I am thinking it should be black, tough, flexible, waterproof. Keep the water out of the GRP and protect from stonechips a bit (OK, probably a bit late for that). This led me to think of roofing paint - something like this
, which is a low VOC (so shouldn't do evil things to the resin) elastomeric coating, and still a bit breathable to let any moisture out of the laminate. Any thoughts?