There's a nice long thread in the archives about Armor All. IIRC, it mostly brings the oils in your plastic to the surface and doesn't really add anything back in. Eventually there are no more oils and things begin cracking. Go to an hiking/kayaking shop and ask for 303 Protectant (www.303products.com/)- this stuff was spec'd by Boeing for maintaining plastic surfaces. It adds oils back into the material instead of leaching it out (also adds UV inhibitors, IIRC). Not cheap, but a it works well and a little goes a long way.

john

> I've been trying to learn this too... I do recall a somewhat recent
> thread about how Armor-All is detrimental to plastics over time. I
> don't remember this being verified, but I haven't used it yet.