Hello dear MT-er! Since I had friction/piston-eater on my moped and didn’t know what to do with the old piston, I thought I was turning/milling a shot glass out of it. But in order to really use it as such, I want to remove the piston from engine oil first of all. Now my question: Is there a cheap way/a simple home remedy to free the piston from engine oil? And should I put a kind of paint on the piston after milling and turning it? Does the bare metal get in the mouth? Thank you in advance LG