How much juice??

[trusty]

I'm getting ready to remove rust from an old piece of iron using this method:

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My charger has 3 settings: 6volts/10 amps; 12 volts/2amps & 2 volts/10 amps.

Which is best?

 

[divedigger]

go with the 12 volts 2 amps, that is perfect for cleaning