Restore Antique Brass Clock: Remove Orange Discoloration

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In summary, the conversation discusses a person's experience restoring an antique brass clock and encountering areas of discoloration that are difficult to remove. They seek guidance on what the discoloration may be and how to remove it, but ultimately decide to leave it alone due to the clock's historical significance.
  • #1
mnmclockman
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I'm currently restoring an antique brass clock. In the course of polishing the badly tarnished brass, I have come across some areas of discoloration which do not seem to buff or polish off.

These areas are orange-colored (look like bronze) rather than the yellow brass color of the rest of the piece.. They are not depressed areas of corrosion, but appear to be simply discoloration on the flat surface of the brass.

I have been unable to remove them with polish or buffing, and am wondering if anyone can provide guidance on what they are, and how to remove them.

It is not an option to deeply buff or grind the brass surface, as that would destroy the dimensions of the multiple brass pieces whch assemble into the completed clock.

Thanks in advance. Martin
 
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  • #2
There are sometimes other materials added to brass to make it more corrosion restant especially for marine applications so 'brass' isn't necessarily brass.
If this is an antique clock it could just be that the brass wasn't as carefully controlled as it is now and this is some extra impurity that is forming some sort of oxide layer.

Sorry don't know specifically what it might be or how to get rid of it.
 
  • #3
Welcome to PF, Mnm.
I would seriously recommend that you not try to get rid of the discolouration. It appears to be an intrinsic aspect of the clock's construction, and thus has historical significance. At least consult an antique specialist before doing anything. If it has any worth as an antiquity, then altering it would destroy that.

edit: Try PMing Hypatia. She's an antique dealer.
 
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  • #4
Thanks very much for your responses. I'll leave the discoloration alone. Martin
 

1. How do I remove the orange discoloration from my antique brass clock?

To remove the orange discoloration from your antique brass clock, you can use a mixture of equal parts white vinegar and salt. Apply the mixture onto the affected areas and let it sit for a few minutes before wiping it off with a soft cloth. Repeat the process until the discoloration is removed.

2. Is it safe to use commercial brass cleaners on my antique clock?

No, it is not recommended to use commercial brass cleaners on antique clocks as they can be harsh and may cause damage to the delicate brass surface. It is best to use natural cleaning methods or consult a professional for safe and effective cleaning.

3. Can I use lemon juice to remove the discoloration?

Lemon juice can be used as an alternative to white vinegar in the cleaning mixture. However, be cautious as the acid in lemon juice may be too harsh for certain types of brass and could potentially damage the surface.

4. How often should I clean my antique brass clock to prevent discoloration?

It is recommended to clean your antique brass clock at least once a year to prevent discoloration. However, if your clock is displayed in a humid environment or exposed to pollutants, it may need more frequent cleaning.

5. What should I do if the discoloration does not come off after cleaning?

If the discoloration persists after using natural cleaning methods, it is best to seek professional help. A professional can assess the damage and determine the best course of action to restore your antique brass clock.

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