Of course I can! Since I make all my boards, I can make any size for you. You can go through the process of working with you on the colors.
I use professional Oil Paints with a uv protectant Resin to seal it. You shouldn't have any fade unless it's sitting outside in the sun for a long period of time.
Just like any type of artwork it needs adequate light on the piece. I recommend a spot light or directional can light on the art or indirect sunlight to really shine and show all the small details such as the metallic pixments and glitter.