I have a Jetarrows A-10 (EDF) that I am just about to paint and have a question regarding the surface preparation.

The whole model is composite and the glass work is excellent. It has quite subtle panel lines moulded into the surface. I am not after a museum quality finish, just something simple that looks ok from a couple of feet away, so was planning to spray it with thinned Humbrol enamels.

Do I need to do anything to prepare the surface for the paint?