Stop in for a cup of coffee

Princess Valiant said
Cylinders are getting surface rusted a bit but I think this engine was rebuilt some time ago and then not taken care of after awhile. When I got it, it was sitting under a car port, somewhat in the elements

The gouge is in the carbon not the piston

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Tooljunkie said
A little honing and wd-40.should clean right up! Much ridge at top of cylinder?

She may be able to get away with a round wire brush on a drill to clean up the cylinders and piston... I've done that with a few engines with success... Be sure to vacuum and blow out any debris with compressed air and then lube the cylinders with some STP or Motor Honey...