I've tried nearly every type of product like that on the market and without a doubt the best is Zaino Z-16:

http://www.zainostore.com/Merchant2/...ory_Code=Zaino

It's actually listed as a tire gloss, but it works wonders on plastic such as the cladding on VX's. I wish I had before/after pics from when I used it on my ex-RX7, but I didn't have a digital cam at that time. It's a bit expensive, but well worth it and it lasts forever. It doesn't give the super glossy sheen Armor All does, but makes it look brand new and fresh. Obviously it works well on tires too Just my $.02