I've roughed out a foam plug for some new bodywork working off cad drawings. I've used celotex type low density insulation and i'm now looking to start coating and filling. I was considering covering the foam plug in a fibreglass skin and then building up the finish in layers of polyester primer filler. Can you recommend a suitable cloth and a whether I can use a polyester resin or ?. I have made the plug approx. 3mm smaller than the finished item to allow for a finished build up. ( I attach a photo pre sanding to give an idea of curvatures. Thanks