Here is my procedure on how I clean pistons, ring lands and re-ring pistons. This is how I do it. It's worked "for me" better than forty years. I don't use a ring land cleaning tool. I never have. A lot of you don't either, as I am sure you're well off enough to buy new pistons. I've never been fortunate enough to do that with every build, so I "use what I have". This is how I do it.