One of the more challenging aspects of polishing the housing of the HB's has been balancing the amount of material being removed (oxidation, primarily) and bringing out the shine of the aluminum. The stamped markings on the housing are not very deep. Most are for lubrication points, but a few are production or inspectors marks. Regardless of their purpose, preserving them as much as possible is a good thing. Most of the time I used a dremel with a felt wheel and jeweler's rouge to remove surface oxidation, and a 220 grit abrasive wheel to slightly more aggressively deal with surface pitting and heavy oxidation. The abrasive was very, very sparingly used.
I did make one breakthrough...to get the swirl marks off from the felt wheel, use Mother's Aluminum and Mag Wheel polish. It was the fix I was needing. So pleased in fact, that I did a partial mock-up of the housing, commutator and handle with 831. I set the build plate on top of the housing in its approximate location, but not screwed down. See for yourself....
Here's a few of the before/after prior to what's above to approximate how it will look when finished.
It finally has the glow I was looking for. Just need to resolve this issue with the bushing and it will be ready to reassemble!
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