Well, here's MY experience w/303. My 2001 VX is a two-owner, "high desert", garage-kept VX w/80K miles. Original owner used 303 on the cladding RELIGIOUSLY every 3-6 months; I've kept up that regimen over the 2.5 years I've owned it. Last Sunday I replaced the RR and Rear "underdoor" cladding with new (thanks, Merlin!) - I was VERY concerned about color differences between the existing cladding and the new cladding. There was ZERO difference between the two - you literally can NOT see a color/shading difference between the old and the new! Put me down as a serious proponent of 303...