I've made the aeroscreen by cutting and shutting a deflector from the tail gate of a Fiesta. It has surface pitting from age/weathering, its been painted with ordinary spray paint but it has crazed.

Its foam cored softish rubber moulding, anyone any suggestions for suitable paint finish to hide the surface blemishes and paint finish that does not crack.
Rescued attachment Aeroscreen.jpg

We have problems with this type of spoiler, 2K is the only stuff that will stick to it, but you cannot bake them because they are foam based and pop at anything above 35°C. The oly way we can get good results id to paint them last thing in the day and allow to slow cure overnight.

can you glue some shiny pvc to it?

Sticky backed plastic