Yes, join us at Caswell's forum. They coach LCD (low current density) type II, which is perfect for home anodizing. It uses a CC PS (constant current power source) as the basis, which is better for home anodizing since most people don't have the equipment of knowledge to titrate the ano tank (a complex method of measuring the exact acid strength and dissolved aluminum content needed to run voltage based anodizing)
To answer your question, always use your largest run as a guide to what size power source is needed.
You mentioned 1' sq., which is approximately 2 sq. ft. of part (a little more for the edge, but let's keep it simple).
At 6 amps per sq. ft., you will need a PS capable of 12 amps for the entire run of 2 hrs (using the 720 rule, it take 2 hours to build 1 mil at 6 amps CD).
Also, at 1:3 battery acid/water, and at 68F, your peak voltage (6061 alloy) will be around 15 volts.
Since you want a little lee way, I would look for a PS that was CC (a control knob for amps) that was 15 amps, and 20 volts.
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