RE: Painting the top of a Westy....
DO NOT paint the top a dark color!!! I had an issue white top on my '85,
now I have the dark matching top on my '90.  I'm having the top of the
top painted white.  The dark top heats up instantly in the sun and gets
very hot.  The white just reflects most of the sunlight and heat.  Last
summer, camped  for more than two weeks in areas with bright sunlight, I
rigged a Space Blanket over the top, made a big difference.