What are you looking for? Excessive deposits or crusted on lead or carbon?
I just tore down my 2500 hr engine and the only sign off observable ware is a ring at the base of the cylinder you can feel with your fingers. Otherwise my cylinders look like that when you take the piston out.
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Bruce Meacham
Building RV-4A 18ZM Built/Own RV-4 254MM First RV RV-33456B