Blown Motor, Engine Rebuild/Replacement.

1slow370

burrs leave a shitty finish tho i recommend using some spiral rolls on an arbor for clean up, and they are cheap at harbor freight, spiral rolls are the way to go on aluminum too if you plan to port anything else. if you for some crasy reason decide to use a burr on anything aluminum make sure to use copious amounts of wd40 or a lube like LPS

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Rusty

What you can do to is. Get a piece of 1/4" diameter metal rod. Cut a slot in one end of it about one inch long with a hack saw. Now get a piece of emery paper about one inch wide and about six inches long. Fold it up twice, and stick it in the slot in the end of the rod. Now you can use that for polishing up the rough areas. You can use different grits of emery paper for different finishes.

Aluminum takes a different type of burr bit. One used for hard metals will clog up. It has to be a courser bit.

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