Originally Posted by RayJ
I've seen a process where taking some aluminum polish like Mothers and placing a small amount on the piston skirt and putting that into the matching sleeve. Then working that up and down afew times like you do with your garolan sleeve. It seems to work very well as well.
I heard people do it to lapping pistons by sleeve, not by tool and this is wrong!!! Sleve has a taper inside and if lap piston by sleeve you piston will became taper too and it will not work properly. It doesn't mean engine will not work, it means will not work propely-the tapers one of the most important keys of power.
So if you want to use lapping procedure, I will sugest you to order in mechanical shop make for you the tool, get some lapping compaund and you will be good to go. If you go for it, please rememeber, this procedure required a lot of patients, specialy on the beginning ( no feelings for 3-4 first times) then will be much easier.
One more thing-never use "diamond compaunds"-they are not washing out from AL alloys, the good for Chrome plating, but not for pistons.