@cole_santos I actually tried it with a piece of screen mesh a few years back, using pencil lead as the graphite anode. Sadly only one or two of the first leads Iused were sturdy enough to last for a couple days and start accreting material.
It built a chalky layer over about a third of the screen, at least some of it thick enough to not chip off, but I ran out of anodes to use, and when I attempted to use aluminum as an alternative, it filled the container with aluminum foam or sludge, contaminating the seawater I was working with.
I was going to retry the experiments after getting a DC bucking power supply (5-20A) so I could test it with as close to the 1.5V ideal accretion voltage, since it has a significant decline in efficiency at 5V to basically no accretion at 20V, according to the papers I had read. That has sadly not happened, and doesn’t look to be in my immediate future.