Assuming you are looking to paint the exterior of the roof, it is Polycarbonate, clean, dry, sound and prepared as detailed in the Technical Data Sheet we can recommend Britannia Aquashield Eco.

This is available in black, grey and Solar Reflective White.

Please be aware as it is a clear substrate brush strokes may be visable on the interior and even the Solar Reflective White will reduce the amount of natural light.