ummmm ! I noticed that also, my fronts seem to be ok, but the rears are starting to show rust marks, i did use two different types of paint one on the front and one on the rear, so looks like i need to do the rears in the same as what the fronts have been painted in
![signLOL :signLOL:](https://www.mk5golfgti.co.uk/forum/Smileys/newsmileys/signLOL.gif)
Sorry it dosent help you, but would be good to see if there is anything that can prevent this from happening again...