I got this today after contacting VW UK HQ if it helps
Thank you for contacting Volkswagen UK. Please accept my apologies for the delay in my response.
The 12 year Body Protection Warranty is applicable to corrosion which works its way from the inside to the outside of the vehicle. Any corrosion which has been caused as a result of external influences such as accident damage or stone chips is excluded from this warranty.
If you are not satisfied with our final decision and would like to seek further advice then you would need to contact PVWI who are the only independent company we would accept reports from. PVWI are the professionals’ choice to inspect and report on all paint problems on painted cars and road vehicles.
They inspect, analyse, and produce professionally written reports detailing the paint defects, probable causes of the paint defect and possible rectification procedure associated with vehicle paint problems. PVWI has more than 17 years in business, more than 25 thousand vehicles have been inspected on behalf of motor manufacturers, consumer associations, insurance companies, legal representatives and the general public. PVWI are independent paint experts who provide confidential reporting on car paint and road vehicle paint defects.
PVWI’s website:
http://www.pvwi2010.co.uk/Contact telephone: 07562 117167
Email: office@pvwi2010.co.uk
I hope this information proves useful. If we can be of any further assistance, please do not hesitate to contact me on the number below.
Thank you for contacting Volkswagen UK.
Kind regards