Rotary arm car wash.
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Previously:
https://www.homemadetools.net/forum/...203#post211227
https://www.homemadetools.net/forum/...887#post137368
https://www.homemadetools.net/forum/...668#post136571
https://www.homemadetools.net/forum/...3423#post99048
https://www.homemadetools.net/forum/...729#post206190
