Thanks for the link, Dennis!
Molex:
Yes, stay away from all of the silicone products (including Armorall).
Lexol Vinylex and 303 are both good for dashes. 303 is shinier.
303 is a good all-around product. I use Black Again for black plastics that have faded to gray, and it works pretty well, but does not last. I'll have to try a topcoat of Meguiar's #42.