Years ago I did custom painting for hire. When painting delrin (celcon, etc) handrails I would use an automotive flex additive mixed in with Floquil, Scalecoat or Accupaint.
Obviously I can't use said additive in water based paints. Sure, I could still get the lacquer based paints, but I've worked hard at making the transition to Pollyscale, and the only glitch left is the handrails.
I know about using Tamiya (or other brands) R/C paint designed for lexan car bodies, and that does work well for painting the ends of railings are typically white or yellow. But when you need to paint an entire handrail it becomes hard to match model rr colors. For example: I have an undec Kato SD45 to paint in D&H, so the entire handrail set needs to be painted in grey.
Here are the options that I've heard or read about, but would love to hear feedback from all you other custom painters out there:
1) Lightly sandblast the handrails to aid adhesion.
2) Use above mentioned flexible paints and try and mix your own color match.
3) Go back to lacquers with flex additive.
4) Try Badger ModelFlex. I've been told that this paint forms a "skin", and flexes with the handrails. But I have yet to experiment with it.
5) Switch all locos to wire handrails/metal stanchions.
6) Paint the handrails as is and make sure you never, ever touch them again.
So what do you all think?