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Help on refinishing doorknobs

Q. I have a question on re-finishing. I have several doorknobs that are the bright shiny brass, I'm not sure what they are made of, but I was wondering if there was a way to dull the shine and age them without the aged effect to rub or wear away? Please help.

"Patinas"

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Thank you,

Jessoca L Bricker
- Bloomington, Illinois, USA
2003

Q. Would like to know how to make my bronze ugly doorknobs have a cool finish. I have had a formula in the past but lost it. I remember one ingredient was muriatic acid ⇦ on eBay or Amazon [affil link] . Do you know this formula?

Priscilla Cusenbary
- Graham, Texas
2004

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