There would still be traces of grease on them, which contaminates the welds. It was most important with house numbers that I used to make in order for them to keep their shape...
Huh. TIL.
I'd have figured an ultrasonic would get more than elbow grease would. Cool. Dig your work BTW.
"Refreshingly Unconcerned With The Vulgar Exigencies Of Veracity "
I guess that's an option, but they're hardly biodegradable and I prefer to be a bit more environmentally conscious than that. My local municipality does recycle metal, so I suppose I could take them there.
Unless you are bored and have lots of time to kill making things out of bike parts, here is your answer.
"With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.
“Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.” -- Aaron Levenstein