I experimented with finishing techniques using PCB’s, Othermill CNC and some chemicals. The most promising colors are shown below:
From the left they are: ferric chloride solution for 3 minutes, top layer milled off, original, tined, buffed. From here, I decided on a couple of color combinations and started fabricating.
While none of them quite capture the aesthetic I’m going for, the last one warrants further exploration.