I usually use automotive acrylic gloss black, from Supercheap, Repco or any auto parts shop. For the Pinball rescue decals they recommend a gloss finish in their instructions supplied with the decals.
+1 and ensure the primer, topcoat and clear are compatible with each other. ie White Knight, dulux etc etc ..
Good point, AVOID quick dry enamel, this type of spray can paint is not compatible with any other enamel.
If you spray quick dry enamel over other enamel spray can paints it will lift them.
I found this out the hard way, started a job with enamel, ran out of paint and the local hardware store only had quick dry, about 45 seconds after application the whole surface crazed and lifted DOHHH!
