If you mean -- make it brand new shiny again after oxidized, I'm afraid that I have not had any good success with that. I tried a product a while ago that claimed to strip the oxidation and bring the silver back to white, but it did not do the job properly. So once you oxidized it... bye, bye... :-)

I've treated pieces of PMC with LOS and if I wasn't happy with it, I just passed the flame of my micro-torch gently over the metal and the LOS disappeared leaving the Silver bright and shiney again. This would probably work fine for wire, as long as the torch is in continuous motion and not held in one place long enough to melt the wire. It actually takes some doing to get Sterling Silver to melt. Try a test piece of Silver and see! I wouldn't hesitate to try it. If you have stones or pearls alread embedded, this would be a bad move though. The next option would be to soak it in pickle to remove the oxidation...again..pearls wouldn't like this much, but a quick bath might be worth a try. I use a great product fromhttp://www.cooltools.us called Silver Prep. It is a so safe that it can be poured down a household drain and is a terrific product. I use it to take the scale off of soldered Silver and the results are excellent! They have a good presentation on this product at the site! One other option...drop the silver in a heavy ziplock bag with baking soda and give it a good rub. This gets oxidation off of silver as well, but is a very gentle treatment compared to the others! Just a few ideas to toss around! Good luck with your project! ---- Mona

One more thing...if you are using any type of pickle, it works better if it is warmed in a glass bowl on a mug warmer. Heat stimulates the removal of the oxidation much faster! ---Mona

I tend to wait and really think about if I'm sure I want to oxidize a piece because as Eni answered, I also have had limited results when trying to fully remove oxidization. Especially on wire pieces partly due to all the spaces between the wraps that just can't be reached. Pmc is easier to remove oxidization from but any settings/mountings can create a difficulty. The best bet is to be sure you desire an oxidized result before proceeding. Although I am interested in the "baking soda" method Mona mentioned and may have to dig out a piece and give it a try:)
Bonnieblue

Well, you can't tumble it clean of LOS oxidation - if you could, all of us who tumble our LOS'd work for a final shine on the high spots would be SOL! (forgive me, I couldn't resist the visual pun!Sorry if I have offended!)
However, I have gotten good results with the following methods.Try one or both, repeatedly if necessary. They both rely on the chemical reaction between the silver and aluminum in this particular solution. So make sure the two metals touch one another.

1. Line a pan with aluminum foil and fill with water; add a tsp. each of baking soda and salt. Bring to a boil and immerse silver. Polish with soft cloth.

2. Aluminum foil, baking soda, salt, very hot water (boiling, if possible). Combine in clean sink. Put tarnished silver and silver-plated items in and let set a few min. Watch tarnish disappear from silver - reappear on foil. Natural chemical reaction kids love & teaches them science!
Perri

http://www.ShaktipajDesigns.etsy.com
http://blogs.delphiforums.com/shaktipaj/start

Hmmm, Now not only baking soda but aluminum foil and salt. I'm definitely going to have to try this. I have a necklace that I made a several years back that has tarnished to black( although was never LOS ) from lack of wear and the climate here that I would love to restore and would like to use as my test subject. It includes Swarovski pearls(a purple peacock color) and rainbow obsidian. Will this process be safe to try on this piece?

Bonnie,
I don't know about the Swarovski pearls, but the obsidian is bulletproof to this process. Swarovski pearls are of hight quality, but they are still made with a coating process, which can be scratched off, and will flake eventually.
How wearable is the piece now? Can you make it wearable with some elbow grease to take off the bulk of the tarnish and then immerse it in the solution for a shorter time?
This process takes literally minutes if the contact between the metals is maintained. It really is pretty amazing to watch, even if you aren't a kid!

Perri
www.ShaktipajDesigns.etsy.com
http://blogs.delphiforums.com/shaktipaj/start

Hi Perri,
Unfortunately the piece consists of wire wrapped link chain holding the pearls with a huge rainbow obsidian faceted teardrop pendant.Fear of damaging the pearls are why I haven't tried other methods but all of the wire links are black with tarnish and it looks terrible. Not really wearable at all :(
Bonnieblue