Ok, it's been a while since these posts but I just have to ask.
The Duplicolor engine enamel that I googled was a rattlecan. MReick do you rattlecan your cases?
I've had great success with rattlecans myself on other projects and with good prep, masking, wet sanding and a clearcoat can look as good as a professional job just from two feet further away.
This will be just fine for my bike.
What say you?