Can something be "re-anodized"

[jordan...]

Hi all,

i've seen how the oven cleaner can strip the anodizing, but I was wondering if something that is anodized can simply have another coat put over the top in a darker colour

eg. I've got something anodized purple that i want black, can i just anodize the purple part black?

hope that makes a little sense

thanks in advance
jordan