Re: Powder coating something zine plated?
Raw zinc is a great base for powder coat
Most zinc parts though, are chromated too, and most chromates don't tolerate high temperatures.
If these are older parts, the chromate may be gone or partially worn off already. Where it's gone you're likely to have zinc oxide. Powder won't stick well to that, and weak chromates may lift.
Chromates & oxides will come of with a blasting. An easier way is to strip it in @5-10% muriatic acid. This also activates the zinc, which is best for powder coating.
Of course, you can strip the zinc completely in acid too, if you want it back to raw steel.
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