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Plating Pot Metal Plating this troublesome metal can be very challenging. If you have questions, tips or tricks about plating onto pot metal (zinc diecast), this is the place to post them.

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Old 02-16-2007, 07:48 PM
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Default Antique Pewter or oil rubbed bronze finish

We're remodeling our kitchen, and are thinking of ways to save $ on the project. One way is to replace the knobs on the cabinets. They had a bright brass finish when they were new 18 years ago, but I don't think they are solid brass. Should we treat them as though they are pot metal, for refinishing purposes? Also, how would we acheive either a dark nickel or pewter finish or an oil rubbed bronze finish? Thanks for any suggestions.
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Old 02-16-2007, 08:34 PM
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Default Re: Antique Pewter or oil rubbed bronze finish

D'OH. I meant REPLATE the knobs!
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Old 02-18-2007, 09:33 PM
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Default Re: Antique Pewter or oil rubbed bronze finish

If the knobs are brass plated and in good shape (not pitted, no corrosion), you may be able to plate directly over the brass. It is probably coated with a lacquer that would need to be removed, the brass then cleaned, reactivated with an acidic solution, then replated. From here, you have many options. For a darker look, there are cupric black oxide solutions that will give you different oxide shades including black, depending on time and temperature of oxidizing solution. You can then lightly relieve some of the black to give an antique look, then lacquer to protect. You could also plate a matte nickel, followed by black nickel to give a dark nickel coating. For a pewter look, I have plated parts in a matte tin solution, followed by the same oxide solution to give a gray pewter look. This would need a thin coat of lacquer to protect from further oxidation as well.
You can probably purchase these processes from Caswell and do it yourself for a fun home project. If you do not want to be adventurous, reply with your email address and I will process them for you.
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