I read once never to use Armor-All and such, that there was some sort of chemical in that stuff that would break down stitched seams and over time, the heat welds on welded seams on tubes.
303 Protectant is what was recommended to me by 2 different manufacturers. I've used it for a number of years with excellent results. It will make your tubes slick as glass and blocks UV rays. Kinda pricey but works.