Not the body, the rest of the car

My painter, Dick, is an experienced restorer and he keeps asking me about paint colors. I've done some searching here, but haven't found the requested info.
Is there information available on the correct colors for frame, core support and suspension/steering components, firewall and inner fenders, inside of trunk, underside of body, steel part of heater box (and fiberglas parts? Dick recommends blasting the fiberglas, then coating with satin clear.). Also, on the underside of the body, are the edges masked with a clear border between underside and body sides? Or, as Dick says they did with Pontiacs, is there body overspray on the edges of the underside?
Dick is 76 years old and his attention to detail is amazing. Whenever I ask a question, his usual response is "well, that depends on how persnickety you want to get". He is very pernickety with his restorations!
Thanks for any info you can provide!

Chuck