Hi

I have a 2009 Plus 4. I have found some paint cracks along the bottom of the running board. The cracks are found in the seam between the bottom lip before it starts to become a flat rolled shape. The cracks (about 50mm) are found on both sides and are back toward the rear wheel mudguards/fenders. (I would have loved to post an image but the website by limiting data size doesn't allow this).

There appears to be a very limited amount of bubbling near the cracks but this is aluminium so where has the corrosion come from? Also I am worried that by using a trolley lift on the chassis/cross member point in front of the rear wheels I have created some body distortion leading to cracks .... but surely not?

Is this occurrence unusual or have others experienced this? Also I don't want the whole panel respraying so any thoughts on a more localised paint solution.

Thanks