I took mine into Pullman in Sunderland, the guy took paint depth readings photos, the lot, told me he would be in touch after he had spoke to Main VW, got back to me telling it was a Mechaincal fault and that the mud guard on the inside of the wind was rubbing on the wing causing it to blister, what a load of cosh!! I have now bought myself two brand new wings from the dealer, and am getting a mate to paint them! Gonna cost bout 600 all in, just couldnt be bothered with VW and all the hassel! The car was also under warrenty then and has a full VW service history, with only 56000 on the clock!!