It wasn't that hard actually. You take the colors you want and with a rubber roller on a smooth surface (like glass). Roll over the paint until you get a gradient you are happy with. Note worthy the biggest issue is maintaining the consistency with of the gradient.
Oh man thank you so much. Trust me it is possible. Just go in with a plan that helps a lot especially when dealing with acids. The color part that is just fun and you are right one color could easily makes piece work.