Both of my wings started to bubble about 3 years ago. Despite having 11 dealership stamps in the the service book's they didn't want to know!!!
I've mentioned it when having it serviced in 2014,15 & 16... Got the (fob off) reply "We haven't got a bodyshop at this dealership, you need to take it to a VW dealership in Shrewsbury"... Don't know why Shrewsbury when I live inbetween Birmingham & Wolverhampton!!!
I'll just pay and have them done when they get really bad, not worth the hassle...