Hi, We just went straight on with the fibreglass matting. If you let the 6mm chops cure you could end up with pull marks in the gelcoat side where the thick 6mm filler has cured shrunk back applying at least one layer of matting over prevents this.

for painting you would need to speak to a paint supply to get their advice on suitable primers for their products but most fibreglass laminates will take car primers and paints, also marine primers and paints. for polishing fibreglass/GRP (Glass reinforced plastic) you can use products such as the farecla or ROAR range of polishes from our website, unfortunately we do not have a video on polishing.

Gelcoats can sometimes come out of a silicone mould quite tacky due to a reaction with most standard silicone. So it best to test first with your particular silicone. Addition cure silicone, sometimes refereed to as platinum cure silicone, can usually be gelcoated without issues as shown in this video approx 6.57minutes in.... kzfaq.info/get/bejne/kLiKrbqCnd_cm2w.html bear in mind however that gelcoats are a polyester and contain styrene solvents which can eventually dry out rubber moulds and reduce their lifespan compared to plasters ect.