Yes, textured powder coat, this is his hammertone copper look.
It changes color depending on the angle of the lighting.
The GTA frames come bare, my local PC will do a frame +some extra parts for me for a flat $100 in any color and coating process I want, and I have been playing with all the cool new ways they can PC now.
Here is the color sample.
You can learn more about special effects PCing here.
http://www.ifscoatings.com/content/colors/ifs-special-effects/
Nothing says Custom more than custom PC that no factory bicycle ever has on it ;-}