For anyone who has experience in auto painting.

If you are going to paint the fiberglass bumpers in the scheme that has
two-colors. (With the darker color the raised portion of the bumper.)
What is the best way to do this?

Paint the bumper the darker (raised) color first, then mask and spray
the rest of the bumper the lighter color?
or
Paint the bumper all the lighter color, mask and spray the darker raised
portion ?

Thanks

Todd
'88 Westy