J_R

I used a denture type tooth brush and on some places I used a cotton swab and acetone.

I left the parts in the anti freeze for two night and one day. No discoloration.

Just a note: The pistons are from a Ryobi engine and all of the crud was accumulated in the Weedeater configuration.

I have 7 of these that I am cleaning up and they all look very good.

Happy flying

Lee