i will second that , mind you i dont get many as when i clean the van i always do the roofHi wayne I use fenwick's black streak remover it's brilliant, just squirt on for a few seconds then wash off its as simple as that
That's very much in line with how I regard a lot of speciality caravan products. There is invariably an ordinary household product available at a fraction of the price.I think some owners have the attitude of 'nothing is too good for my caravan'and will happily pay through the nose.It doesnt have to be Mr Sheen - any household furnature polish works wonders.
I give mine a wash with car shampoo & then any black marks that remain get a quick wipe with furnature polish & the jobs a good un.