Re: Fresh copy cad system leaving white swirls
Odd. I've been told the range is 90-120º, w/100-110º optimum.
Sounds like after step 7, it's just raw zinc? No chromating?
How are they being dried? Drip-dry, warm air, hot air, oven?
Again, sounds to me like accelerated oxidation.
If the parts are NOT chromated, you might try spraying w/WD-40 after final rinse, then let that drip-dry for a day.
Sean
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