Thanks for the suggestion Stuart, did you clean the surface with acetone before you painted? I ask because although Jean do and others have told me to do that, surely any wax releasing agent would be on the outside, not the inside?
I want dark grey and a satin finish though so I don't think the one you used is for me although maybe the dark grey undercoat would do the job. Its only the inner wheel arches and inside the nose that will show, the rest is panelled over anyway. I will make more enquiries. Thanks again.