i used a brush to apply the G50 gelcoat. I could not get a even coat, because i got holes in the coat. Looked like the mould had been contaminated by chemicals, but iam shure it isnt. The gelcoat cured for a couple of hours before i took i of. Iam cleaning again with the mould cleaner but it dont seem to evaporise like it i remember it does. It still look like the mould is contaminated. 

Same thing happend. lots of holes in the gel coat.