You could polish it... Yeah it's a pain in the ..., but unless you want to hide your beautiful beautiful copper, you're looking at daily polishing pretty much. Sometimes I let mine go two or
three days, but I'm usually polishing it pretty often. I use Noxon 7. It's simple enough to use. Apply and remove.
Oh, and get ready to wash your hands like all the time. Basically, if you want a copper
mod, it's what you sign up for. I love my Vanilla clone, but I just ordered the black Akuma clone so I won't have to worry about always polishing and hand washing.