My wife used to do upholstery on motorhomes, both old & new. She uses petroleum jelly (IE: Vaseline-type stuff) on all of the hard plastic interior pieces, and especially the dash board top. This rejuvenates the plastic giving it back some of the original oils that the sun bakes out of them. Dash boards should get a rub down each spring & fall, while the rest of the parts get it in the fall only. This is because they aren't as exposed as the dash. We had a '74 Plymouth Satellite, which she bought new, that still didn't have a crack in it when we sold it in 1999.
OH, It's good for vinyl seats too; just be sure to rub it in very well, and then wipe it dry with a towel to get the slickness off (applies to all parts you treat)
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Stale Trooper
'05 CVPI
(My '99 got wiped out with 238,513 miles on the clock, stupid woman driver)
It's White, with a black grille, a spotlight, and the butt is black. Need a picture? Thought not
