I used the correct parchment pearl rattle cans from Classic Industries. The key is to properly prep the plastic arm rests, seat backs, etc. and use a good plastic adhesion coat like Bully Dog - available at any Sherwin-Williams Automotive Finishes location. Then paint with the two stage kit from Classic.
My kick panels, dash and sunvisors were black from the factory so I left them that way.
I used PUI seat covers and door panels - they have the correct '69 parchment pearl.