The best option is to use a Universal Fibreglass/GRP Kit.
This comes with glass matting, resin, topcoat, hardener and tools to apply.
The only additional item required would be acetone which can be bought in 1ltr, 2.5ltr or 5ltr containers. You will need the acetone for cleaning down, once you have scuffed the existing surface prior to applying the new laminate and also once the laminate is cured, again scuff the surface with 80 grit sandpaper and clean with acetone before mixing and applying the new topcoat.