Couple of decades ago I over revved a small Isuzu diesel and put a rod thru the block. A good volunteer engine and new rings yielded a engine that met new specks. Never could get the rings to seal. Smart mechanic told me to run a small hand hand full of Bon Ami thru it as chrome rings will never seal on a used bore even if honed. Yep worked great. Engine was running great when the body finally rusted off the engine 200K miles later. Engine was close to 400K miles.