[hackspacebristol] Steel balls

Richard Sewell richard at jarkman.co.uk
Fri Feb 17 09:35:37 UTC 2012

If you're interested in the steel-ball shop:


I suspect the foil trick:
relies on pre-rusting the balls to get a decent coating of red iron(III) 
oxide, as opposed to the black oxide that was on the ones we were trying 
last night.


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