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Aluminum is much more prone to fatigue failure than steel. Scratches are one thing, but grooves deep enough to fill with paint could create stress risers more likely to propagate into a crack. Hopefully, any stress fractures occur on the outside and not the inside where you can't see it.
The Torus Bowl
A keytar with 312 keys! Bonus points for a expressions ripped from a kung fu B-movie.
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