I purchase all of my powder from www.columbiacoatings.com
You can pick any color you wish from standard high gloss colors to metallic, translucent, chrome, or chameleon. I order all of the powder your project. I have over 100 colors in stock, but if I need to order powder it can take up to a week to get it. I have samples of many of my stock colors shown below:
Matching an existing color is near impossible, unless it is black. Colors cannot be mixed like paint can be.
Most colors do not need a clear coat. They are naturally very high gloss. Many of the translucents need chrome base, which I can spray. Some colors are UV sensitive and require a clear coat. You need to pick the correct color for the application.
I can spray a matte clear over any color to give a final matte finish.