Ultrasonic Parts Cleaner liquid? What are you using?

RustyRatRod said

Yes, but you have to be careful, as Super Clean does not play well with aluminum. So watch the percentage.

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Especially polished or anodized aluminum.
Polished can be fixed, anodized is ruined.
Other aluminum parts like cast it's more of a timing thing, clean it but rinse it off quickly or it will stain