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Cannot clean copper roses

Hello, my name is Brenda. I am an artist who makes roses out of copper... The problem I am running into is the discoloration caused by using a torch to braze the petals onto the stem. I cannot seem to get the oxidization off enough to patina the rose, I would rather not use any real caustic chemicals, and my Dremel [on eBay or Amazon] only goes so far in cleaning them due to the arrangement of the petals. Can any body give me some ideas? Thank you so much.

57056

Brenda Westberg
artist - Portland, Oregon, USA
April 17, 2011

Try hot solution (80° C) of 47,5 gms citric acid [on eBay or Amazon] /47,5 gms sodium gluconate/5 gms tartaric acid [on eBay or Amazon]/1-5 lit water.Hope it helps and good luck. vinegar [in bulk on eBay or Amazon] and peroxide mix can be used too. Hope it helps and good luck.

Goran Budija
- Cerovski vrh Croatia
April 22, 2011

Very good article on peroxide based pickling solutions for jewelers - users.lmi.net/~drewid/PWR_Pickles.html
Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
April 26, 2011

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