I did quite a bit of research on zinc plating, and Newmann just happened to post the exact video I used to come up with my own system (with a few of my own modifications). As you can see in my pic, I use a thicker copper wire to sit across the container, where the video guy talks about some aircraft grade rod of some kind. And the biggest difference is my power source - two D batteries from the dollar store! I'm sure that being able to adjust the amperage to the number of parts is the bees knees, but having the 3 volts supplied by the batteries seemed the perfect source for 4-5 small pieces at a time. Rather than cut two pieces of zinc only to mend them back together seems strange - I just run a strip of zinc down one side, across the bottom, and back up the other side; easy peasy.
I was able to get a roll of zinc from amazon for $23 bucks (enough to do 20-30 bikes at least, or one room of Newmann's garage). The rest of the materials are very cheap - from Wal-Mart and Dollar Tree. Though not totally "necessary", I also bought yellow chromate from Caswell for $30 bucks, enough to last years.
I soak any rusted parts in Evapo-rust and hit them with a copper wire wheel on a bench grinder to prep them, along with a dip in the diluted muriatic acid.
Below are before/after pics of some of the parts, my super simple set-up (I used spray bottles over a 5 gallon bucket to clean/rinse between steps), and a pic of my YZ to show some of the yellow chromated parts - see the foot peg bolts and carb clamps. It also makes the fork and handlebar bolts look really sharp/OEM factory.



