Ultrasound solutions for aluminum firearms

[338lapua]

So just ordered a 30 liter ultrasonic cleaner. I plan on using water and then putting my AR receivers in a bag with a cleaning solution that is aluminum safe. Any suggestions on on what solutions to use for a AR that will not eat the finish off?

 

[Manitu]

Aircraft Grade Simple Green got it from Amazon.

https://www.amazon.com/simple-green-aircraft-cleaner/s?k=simple+green+aircraft+cleaner

 

[mtptwo]

Do not use normal household Simple Green cleaner. It will damage aluminum.

The aircraft grade SG is good to go.

 

[338lapua]

Do not use normal household Simple Green cleaner. It will damage aluminum.

The aircraft grade SG is good to go.

So it is safe to use with water? I will get a gallon of it this week and give it a try on some AR receivers I have laying around.