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The Magic Cafe Forum Index » » Ever so sleightly » » Tiny black spots on brass (0 Likes) Printer Friendly Version

fortasse
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Any ideas on the best way to get these out?

What causes this anyway?

Fortasse
Bill Palmer
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Any good brass polish -- simichrome, nevrdull, vinegar and salt, brasso, etc.

Hard to say the cause. could be caused by overspray from some kind of liquid.

If the cups have a clear coat of some kind, it could be caused by voids in the clear coat.
"The Swatter"

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My Chickasaw name is "Throws Money at Cups."

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Tom G
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I've never had any luck removing the black spots. I can lighten them a little. On an old Okito box that I didn't care about I even took a Dremel tool with a polishing compound and it did pretty much get rid of it. Although it did somewhat change the color of the area.
BCS
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Bill,
Would the same be true of cooper? I have a set of cooper cups in which one of the cups has a spot that won’t go away. I have not tried Brasso, but I have used a mag polisher from Mothers. The cups sure shined up, other than that spot.
Thanks for all your Cup knowledge, I sure have enjoyed reading your posts and comments.
Bruce
Bill Palmer
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It all depends on what the cause of the black spots is, and how deep they are. If you shoot black powder and you have a gun with brass fittings, they will get really grungy, but all of it will come off with the proper polish. If they are spots, they will come off. If they are pits, they are there to stay. If they are very shallow pits, you can sometimes polish them away with an electric polisher, but a Dremel tool is not what you need. You need a jeweler's buff. Also, you need to start with Tripoli.

Bruce:

What kind of cups are they? That is, who made them?
"The Swatter"

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My Chickasaw name is "Throws Money at Cups."

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yin_howe
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I too have had black spots on my copper cups (on the inside). I have not tried anything to remove the yet though

yin howe
"Talent without passion is talent wasted.."
BCS
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Bill,
They are a set of Phoenix Cups from the T Frank Mint. The spot is just a fraction smaller than the head of a straight pin.
Thanks,
Bruce
Bill Palmer
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Here is one thread about this.

http://www.themagiccafe.com/forums/viewt......m=115&21

I have a system that uses Tarn-X. It requires excellent ventilation and fairly rapid work. If you want to try it, I will post it to you via e-mail.

Bill
"The Swatter"

Founder of CODBAMMC

My Chickasaw name is "Throws Money at Cups."

www.cupsandballsmuseum.com
fortasse
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Bill : thanks for your advice. Does climate have anything to do with it, you think........excessive humidity, that sort of thing? I only seem to have this problem with brass stuff, not other metals like aluminum, steel, etc.

Fortasse
Bill Palmer
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It definitely can. Also, if there are any unusual chemicals in the air. I doubt that's a problem where you are, though.
"The Swatter"

Founder of CODBAMMC

My Chickasaw name is "Throws Money at Cups."

www.cupsandballsmuseum.com
fortasse
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Bill: thanks again.

Fortasse
BCS
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Bill,
Thanks for the instructions… I am getting my hazmat suite for the project.
Bruce
Bill Palmer
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Don't forget the ventilation.
"The Swatter"

Founder of CODBAMMC

My Chickasaw name is "Throws Money at Cups."

www.cupsandballsmuseum.com
Jeff Dial
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Plese be careful if you polish brass that has a clear coat finish. You are in essence polishing the finish and possibly wearing it off. When it starts to tarnish it will not do so evenly as a result of the polish being missing. I pass on the words of wisdom from my silversmith.
"Think our brains must be too highly trained, Majikthise" HHGG
Bill Palmer
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The Phoenix cups have no clear coat at all. But that is good advice, Jeff.

If your cups are clear coated, try washing them in warm, soapy water. If that doesn't clean them up, then you may have a damaged coating and the only thing you can do for that is strip the finish, polish them and have them clearcoated again.
"The Swatter"

Founder of CODBAMMC

My Chickasaw name is "Throws Money at Cups."

www.cupsandballsmuseum.com
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