[CMOTD]

You can never ask too many questions Henrik , that's what forums are for. I have never painted Scalextric track but it has been done although adhesion is a bit problematic. Experimenting with different paints on a scrap piece of track is a good idea. One word of warning - as you have a digital track be very, very careful when doing the crossover sections, paint in the working parts will not do them much good.