Plain zinc - no brightener or other final finish
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A spring mounting plate off a 1946 automobile.
This is after cleaning, derusting and bead blasting
As it came out of the electrolyte.
All parts have this light brown tint, from something in the electrolyte (which is brown colored).
After 10-15 seconds in a 3-5% Muriatic acid pickle.
This part was left plain zinc, since it will ultimately be powdercoated.
As powdercoated, Semi-gloss black