I use shoe hones, 2 and three shoed.
Be carefull when it comes to scoring.
Scoring is a resoult of a problem, not a problem in itself.
To replace piston alone will fix the symptom, not the issue.
Exoust side only scoring is indicating a heat issue.
Heat issues are usually fuel/air mix related. It can be carb issues, airleaks, overloading, and some other things..
Intake only scoring is common when dirt, birds and small children gets in the engin.
Scoring all over piston happends when it is very fast expasion/heat development. This can be coused by fuel foult, like no oil mixed in fuel or something like that.
These are thumb rules that with a bit of practice and experiance can lead to very precis conclusions.