Point well taken. The reason I used teh toothpaste is I know it is often used as a low abrasive polish for lots of metals, believe it or not. Since I wasn't exactly sure how strong a polish I needed, I figured work with the least abrasive stuff I could think of (and had on hand at the time) The polishing bit I had on the roto tool was about the same diameter as the interior of the sleeve, so the pressure was more or less equal. The WD40 was used only to make sure all the water was removed from the sleeve after I cleaned the Colgate off. In retrospect, I suppose I could have used either the denatured alcohol or the nitro cleaner I had on me.

It didn't dawn on me to use lapping oil on it, which is bad considering I worked in an auto parts store for almost 4 years. Still, since I wasn't sure, I didn't want to use anything too strong and screw the engine up royally. I didn't touch the piston because 1) I wasn't sure it would work, 2) I didn't want to apply any uneven pressure to it and 3) I was just lazy. It's much easier to just pop out the sleeve when the engine is already mounted in the car than break everything down. The engine starts right up, still has a load of compression, and looks to be a monster once I get it broken in (3 tanks so far, 1st 2 minute heat cycle, the next t2 slow rolling in the parking lot, nothing over 1/2 throttle. Even set the endpoint on the radio to make sure)