I primed the foam with clean epoxy ie no filler... that might be my problem. Next time I will use epoxy + microballoons... It really soaks like a sponge. I used about 3kg of epoxy for 1.5kg of cloth ( 7.5 sq m x 200g ). I dont think the cloth was oversoaked because it had a matt appearance. I think the epoxy went in to the foam.
I have to keep up the momentum otherwise I will lose interest and that will be a disaster.
