On their site, 303 states: "A surface treated with 303 Aerospace Protectant is water repellent (beads water). When the water repellency begins to diminish, reapply."

So how come I`m not seeing ANY signs of water beading on my vinyl/plastic? I freshly coated my interior yesterday w/303 exactly as the directions state and today when I got into my car during a light rain, none of the water that landed on my interior panels showed even the slightest hint of beading?