Not easy to do unless you're good at body repairs.
Using Auto repair kit complete with fibreglass sheet.
then you want under coat and finish coat , wet and carborundum paper.
Price for profesionals can't say can't see damage or what body, GPR or Alluminium ? Best phone Autor body repair shop see if they will do it.
Or your nearest caravan service centre/sale is.
At a guess from £100.
B
November 2010