My car has no rust on the wings ..yet . how would i go about removing the inner arch ? thinking of a major clean and then some wax oil . has anyone else done this as a precaution?
IMO having seen a few rusty MK5's now, it is a inherent design fault. The inner wings are not secured well enough, and chafe at the inside of the wing and the wing lip, when allied with road debris (grit, salt etc) it creates fret juice (effectively a grinding paste) it eventually wears through, and corrosion forms, which spreads unchecked.
If you do get the corrosion sorted, make sure you sort out the inner wings, perhaps by trimming, or better securing, or eventually it will reappear.
Just my opinion.