Help please. I make model glider wings by vag bagging carbon onto foam cores. Whilst in general I am very pleased with the result I find that handling the wings leaves finger prints on the surface, even a week after making it. I use the EL2 laminating resin wing the slow hardener. The model is vac overnight at an elevated temp (Electric blanket). It is then stored at room temp. Can you advise how to avoid this please?