Definitely don't use Armour-All. Basically what occurs is the AA replaces the oils and polymer bonders that occur and reside naturally in the vinyl, rubber, plastic, so that your material develops a "dependency" on AA to retain any semblance of shine or feel. Coupled with sunlight beating down on it, you dramatically reduce the life of your top, dash, and interior bits. Ever notice the brown color tires get after you've applied AA as a tire shine, left it on, then washed it off the next time you detail your car? That's the breakdown occurring visibly in front of your eyes.