Sccc,
Very good work for your first attempt.
I agree with Neilfj in all that he said; but let me say it again, you need to get the electrolyte temperature down to the correct levels.
Increased temperature also increases the conductivity (has less resistance) of the electrolyte, the reverse is also true. Your anodization voltages look a bit low due to the elevated temperature. You should expect them to be 1-2 Volts higher when the temperature is right.
A couple of other things regarding the spots:
Unless its been recently machined flat; flat surfaces on aluminum will have depressions and bumps all over the surface, some are too small to see until dyed. These surface defects will effect the uniformity of the polishing, the high spots get more polishing then the low spots. The low spots also tend to trap polishing compound, which can be surprisingly difficult to remove. ANY trace of polishing compound is trouble.
If your DMM will really go down to 0.01 Ohm, the test leads will add 0.1 Ohm unless you have a way to zero it, or unless you are using a 4 wire Kelvin connection. In any event, if you can measure less than 1 Ohm (test leads not zeroed) or less than 0.1 Ohm (test leads zeroed) your continuity test for the anode connection is valid.
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