Knightboat

I am thinking the only way to prevent this from reoccurring is to trim back the wheel arch liner by about 5mm in the offending areas and fitting a sacrificial strip of some kind to the inside of the wing (sticky back aluminium tape?), it has to be attached to the wing as fitting anything to the wheel arch liner mixed with grit over time will still ware through the paint on the wing, plus I think this would need to be done regardless of whether the wing is being replaced or not as it will only be a mater of time before a new wing rusts through in the same place.