How do we know this, DFL? I do not mean to be argumenative, I ask because I do not know if you have seen this first hand, or was it published somewhere. When I was working, we used UV cured coatings on polycarbonate materials and depending on the chemical formula of the coatings, all sorts of things could happen. It was a controlled process and they were able to do all sorts of wonderful things with it. Since I have been retired a number of years, I do not recall that there were any issues with cloudiness in the coatings. Perhaps Loon needs to examine their formulas.