Have you tried some petrol on a rag/microfibre cloth? I had a similar issue and panel wipe wasn't strong enough, but petrol worked. Just be really careful and do it in small areas though, and after each area wash it off and I would polish it to make sure there is no petrol residue left.


DON'T SET YOURSELF OR THE CAR ON FIRE THOUGH! AND BE CAREFUL WHERE YOU DISPOSE OF THE CLOTHS TOO.