MuchAlohaNui
Senior Retro Guru
All you need is a series of 9V batteries (amount depends on the color you want), baking soda, distilled water, a few meters of fine gauge titanium wire, Lye and about four minutes to etch and maybe 15 seconds hooked to the batteries to get your color. If interested search for ‘9V battery titanium anodization’ or something similar. Tons of video tutorials out there.I have been thinking about it.