rubber/plastic protectants

[Wolfsbrg8v at aol.com (Wolfsbrg8v@aol.com)]

What's the best preservative/protectant for the different
plastic and rubber parts of this beast?

I've been using Armor-All for the dash (no cracks, except
for the bits between the defrost vents, which have "risen"), 
but what about the spongy rubber of the spoiler, or the 
door gaskets, or the drain channels on the roof .. anybody 
have a recommend?

TIA
Leo