cause of failure was never determined, local 3M rep. looked at it. As near as they could determine, it was either defective material, contamination of the paint, or poor solution. The solution was premixed by a local shop that installs clear bras. I also bought the material from a shop that was an authorized 3M retailer and installer, but, they were not supposed to resell the product, and that is what the guy was doing, was reselling pre-cut kits on ebay. Our Audi has a clear bra kit installed by the dealer on the hood, and just ahead of the rear wheel arches. The car is an '01, and they have been there since without failing. My only warning is to people who DIY install these kits, that 3M is not very good about warranting them if they fail. I'm not the only with this exp., there was a discussion on one of the Audi forums I'm on about this, that others did DIY kits, had failures, and couldn't get warranty. From my understanding, talking to 3M and retailers, is that with the DIY installs, 3M has no way of knowing that your doing it correct, since your not "authorized" installer, and don't have the ability, as a shop would, to warranty the product or have insurance to protect you.
