Aluminum safe rust remover?

[Pioneer]

Has anyone out there used an aluminum safe rust remover? I would like to free up a chainsaw piston that has frozen up in it's cast iron liner.

 

[skooter]

You can use asatone mixed automatic transmission oil mix these 50/50

 

[U&A]

As said above. Or sea foam “deep creep” is a favorite of mine.

But any good catalyst penetrating oil will work good.


Sent while firmly grasping my redline lubed RAM [emoji231]

 

[pioneerguy600]

Since a piston is rather a loose fit in a cylinder even WD40 would have no problem nearly running down past the piston itself and through the ring end gap. I find WD40 really attacks rust and does no harm to aluminum.