OK, remember that you need to know what the current is too. You can do this with the 0.1 Ohm 10W resistor and another cheap DVM. You can get adaquate (for this) DVMs for $7.00 ea. now.
Using lye for a deoxidizing etch would use a solution much weaker than for anodize stripping. Start with maybe a teaspoon in a pint of warm (not hot) water and see what happens. You want it to just barely bubble when in contact with the aluminum. When its suficiently etched the aluminum will have a slightly frosted look, but you might be able to get the oxide off before it looks frosted. If you can scrub it while etching it will help. This is much easier to do with desmut. I used the desmut warmer and for a longer immersion than the desmut instructions, because I wanted a matte finish, start by following the desmut instructions.
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