How To Clean Ring Lands & Re-ring Pistons

as you know, it's very difficult for me to express myself in english.
I've been restoring engines for 35 years, and believe me, it's a very complex job when you want to achieve excellence.
several publications, and a lot of mechanics use old piston rigs to clean old pistons.
never do that !!
to clean a piston only products specially designed for that.
the surface area of the piston / rings is extremely large, it does not show wear due to sanding, scratches.
you are lucky enough to live in a country where engine parts are very well priced, take advantage !!!
good engine assembly to you all
Andrea