I've read on the boards that some people will polish the piston and sleeve with a light polishing agent before break in to cut down on break in time signifigantly. I had my questions about this and never got a good definitive answer.

I tried breaking in my new SX12 yesterday. 2 hours and maybe a 1/4 tank, since I could not get it to start reliably for anything. So today, I grabbed my rotory tool and some Colgate. About 30 seconds with a rotary tool and a liberal cleaning, WD40ing and after run oil, and the engine starts up with no problem. I just finished heat cycling it for my first full tank.

Anybody else support/oppose this method? I really hope I didn't do irreperable damage to my new, worked engine.