Thanks for that Graham those look pretty good.
I have been looking for the a new non Audi official wing for the convertible but have trouble finding a supplier. If anyone knows of one that does the b6 convertible specific wings it would be very helpful.
In the mean time to stop it getting worse I may try something like this
http://www.halfords.com/motoring/paints-body-repair/rust-removal-treatment/hammerite-kurust-250ml
Tried it before on my much older 924s and it worked surprisingly well.
Interested if others have any experience using it, as was only a very small area I did.
Thanks
Bernie