The parts are soaked in acid to give them a BLACK colour. Then, they are lightly polished to highlight the designs.
After deburring, the parts are old style polished (with a stamp) but do not receive any further treatment.
The parts are soaked in 2 different acids to give them a GOLD colour. Then, they are lightly polished.
The parts are old style polished (with a stamp). Then, they are soaked in acid to give them a LIGHT BROWN or DARK BROWN colour.
Other available finishes
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