Hazen, I made up my key buffing machine from a Sears, 1725 rpm, double shaft motor. Added the Sears buffing wheel spindles, 6" Muslin buffing wheels and a Sears Safety Switch. I mounted the whole thing on a piece of 3/4" Plywood, 8"x20". This has a "hand hold" on the end farthest away from the motor, for carrying and hanging up. On the end closest to the motor I mortise it to accept a piece of hardwood, 8"x3"x1" thick. Glued in place. This "tongue" goes in my woodworking vise to hold it in place. I put rubber piano case buttons on the bottom to cut down on the vibration. This whole thing is portable and easy to use. I lay all the keys out on the bench and have the buffer on the one end. Works good. As for buffing brass, etc., I have a separate buffer made of a piece of Railroad track w/bearings, belt pulley, shaft and spindles mounted on it. It is mounted to the top of a roll-around cabinet, (that also has my horizontal 4"x36" sander mounted w/separate motor). The motors are under the roll-around cabinet top and these are switched with in-line switches. Part of the trick of doing good buffing work, is the buffing compounds. Best Regards, Joe Garrett, RPT, (Oregon)
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