No the front fenders, and valance panel were not bolted together when they were painted. Original paint cars show a painted area inside the bolted joint that is about 1/4" or so of stripe color, on cars with bumblebee striped cars. The fenders, valance and hood were on supports and located near each other, but still several inches apart when painted. The cowl panel was painted and striped on the Fisher side of the plant in Norwood, if the car was a Z28, or Z10/Z11 in 69. Everything forward of the firewall was painted on the GM side of the plant.