I'm an idiot.
Anodize them. No thickness added. It actually strenthens the aluminum. It may not be quite as rich a black as powder coat, but it will work.
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Richard Rhonda Ty and Alex Entrekin
1995 Newell # 390 DD Series 60, Allison World Trans
Subaru Outback toad
CoMotion Tandem
Often wrong, but seldom in doubt
Rhonda's chronicle https://wersquared.wordpress.com/
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