Shield Painting question..

I'm currently somewhere around attempt #23453426 of getting the paint on my Cap shield blank, and came across something I couldn't find answered yet.

I have the spun aluminum blank with the grooves etched in, and I've figured out how to use those to guide the tape... but I'm curious about the coloring.

Is the common practice to leave the grooves the shiny metal color so that there's a break in each color? Is there an intended overlap on each one? (e.g. one groove goes red, another clear, another blue?)

What seems to be the common practice, and are there any tricks for making that part a little easier?

 

Read through the "I'm painting a captain america shield" thread and any question you can possibly have will be answered there, including this one.

Half of each grove corresponds to the painted ring it sits next to.