I've been playing with a couple of brass Caravela clones & a hydrochloric acid / hydrogen peroxide solution. The process causes a cool texture & color contrast.
I think I'll give an aluminum Coppervape a dunking too using a more classical pattern.
Very cool. I didn't want my Noisy Cricket to be like everybody else's Noisy Cricket. So I changed that with a Copper Saline solution and a vinyl cutter.