Seeing as you're already going with Dupli-Color, I'd just find a Red you like and go with that. Just remember to do thin and even coats, to start shooting before the part you're painting and to stop after you're past it. You want a slight overlap for each pass. I highly recommend getting a pistol grip type thingy to put on top of your spray paint can. It makes it so much easier.
Another suggestion, before applying color, and between each coat, I usually go over the whole part with a wet sand using 400 grit. This ensures that any little bumps from dust or paint blowback is done away with and your surface is smooth as glass.
Having said that, and if I understand what you're trying to achieve, sounds like you're trying to do something along the lines of a candy apple and/or metal flake finsh. That'd be where a clear color is applied over a solid (or flaked) base coat to have a glossy, shiny final product. That's usually done with specialty paints applied with a compressed air paint gun rig and is harder than it sounds to achieve. I know guys who paint cars for a living who absolutely hate doing gloss coats for candy apple jobs. I'm sure there's spray can products available out there to do something close to it, but I'd be wary of them. I guess it could also be done with an airbrush and translucent acrylics over opaque acrylics (or enamels, for that matter).
Hope this wasn't too much of a ramble... Let us see what you decide to go with, I know I'm curious!
