I would use a core that has been made for infusion, scored at least. I was at a training session last week and we tried to infuse a sheet of...
Try a d7760 finish mat behind your gelcoat. Also from cantor. Also you could try a 2mm xm core mat behind the gel which takes 10% less resin which...
Prepreg Prepress generally requires an autoclave but progress has been made by companies such as acg which means much lower temperatures can be...