I just got through painting the underside of the hood and it's a real improvement. I could only afford so much for a paint job and it didn't include under the hood or the trunk lid. There's a paint store in town that mixed some Rangoon Red and put it in aerosol cans. A good match and I've done my wheels with it as well. There were remnants of insulation before I painted it but I don't think I'll replace it.