I'd try some Iron X, try on a small discreet spot first. This stuff is amazing but I've not tried it on white paint.
I use it on the car but we had rust stains down the rendered wall of our house and meter cupboards. I gave those a spray, it changed colour as is it supposed to, and looked like I had created a disaster.....I then hosed it off and the stains were gone!
Welwyn Merx Limited is a family run business with genuine passion, dedication and 25 years of experience dealing with Mercedes-Benz and AMG passenger cars. Tel: 01707 395999www.welwynmerx.uk
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