Ya those pictures are a pretty extreme example, most places don't have a UV index of 11+ for 12months of the year. The spar coating on my A6 lights was 1.5 yrs old when the car was killed and written off, other than the scratching from the road grime I mentioned above the spar held up pretty well. OptiLens also doesn't fill marks nearly as much and needs to be applied to a fully polished surface so, like painting, the quality of your prep work directly affects the quality of the finished product.