Yes. you could get a swirling mottled mixed color anodize on aluminum. You will have to ask a local anodizer if he can do it. I saw it years ago. Color anodize uses color dyes in a normally clear anodize, and they have ways of mixing them. Problem is you probably have a one-off small quantity, an anodizer may not want to set up for you unless you are a freind. Big houses have big minimum orders.