Which one is best for painting the tube before casting in PR? I'm particularly interested in white. Or any other white you feel is a lock? I'm striking out on Rustoleum.
I have used Model Master Acrylic paint with PR and have had no problems. In my case, I painted tubes red and green as the background for watch part pens. I roughed the tube with sandpaper, and just brushed it on. If I wasn't being lazy, I would have airbrushed the color on just to get a nicer coat.
arkie, rather than taking the time to paint tubes and cast them to see what happens, paint some kitchen foil that you shape into a shallow dish. Pour the resin into them and see how the paint stands up. You can use the leftovers of other pours instead of mixing some up special. You may also discover that some colours of paint work well but another of the same brand doesn't.