After reading all that I can find here about corrosion (verdigis), I conclude that there is no hope! An extensive experiment by desertgem with Verdi-gone reduced but did not remove the verdigis. Doug has mentioned Biox which I finally tracked down information on. It looks like it would remove verdigis but at what cost? The stuff is PH 2.2 and states that a sealer/wax must be used to protect the surface after treatment. I don't see much difference to using hydrogen peroxide followed by mineral oil. (Or for that matter, vinegar/mineral oil.)
Verdigris and corrosion are two different things. Verdigris grows out from the surface, corrosion eats into the surface.
There's a very simple solution Charlie. Don't buy or collect coins that have verdigris on them. And store your coins properly to prevent the formation of verdigris. Problem solved.
There is actually even better solutions than that. 1. Don't buy coins. 2. Don't collect coins. 3. If you do both, place them in an air tight solution of Liquid Plastic. 4. Do buy coins but don't collect them, send all to me. 5. If you do have coins with contaminates on them, just dip them in something called Aqua Regia. Guranteed to remove all contaminates.:rolling: Lots of silly humor there. But almost any metal on Earth is not safe from contaminations of materials that combine with them. So far I've been on the lucky side since I place all my Albums in Zip Lock Plastic Bags and push out asa much air as possible. For many, many years now, no problems. In the past I've played around with numerous solutions to remove miscellaneous contaminates on coins. HOWEVER, unless you really, really know what that STUFF on a coin is, removing it becomes a horrible experience. Some have success doing one thing, others try the same and it fails completellyl. If you ever try a search on this forum for cleaning coins, coin cleaning, Acetone, etc you could probably end up going a little nuts with great results, good, poor, bad, horrible results and all using similar situations.
Ya Ya, I know that you are right. I am converted! But these came in some lots that I've purchased: It's just a shame that's all. Sorry for my rant.
Problem is Dollar we've all heard a thousand different things. 999 of them do more harm than good. The reality is this - the vast majority of problem coins cannot be helped, so there is little if any sense in even trying. Either sell them and buy problem free coins - or learn to be happy with them as they are. Anything else is a waste of time, effort and money.
That seems the only way. I kept searching here for a solution but what you suggest seems to be it. It is, as Doug says, a seemingly futile task. (I sure wanted something to work on those IHCs!)
It is possible that Verdi-gone might help out the 1911 coin successfully as the verdigris seems to be thinner than the others and may not have much pitting afterwards. The Indians: there will be some reduction, but you can see the "dots" on the left one which will result in pitting and some of the verdigris deeper in, and impossible to remove. The Indian on the right would look a better chance, except there appears to be corrosion (different from verdigris) around the rim. It appears a higher grade, and if you have the Verdigone, it is worth a try as it is quite devalued as is. The Indians are intriguing, you might have fun seeing exactly how much improvement the Verdigone would make.I still find it the only thing on the market which can make improvement on verdigris with out damage when following directions ( IMO). It can't save every coin, but with experience using it, it becomes a valuable asset. Yes, it is best to obtain coins that don't need help, but occasionally as you have found, you get collections where one or two coins have no choice. Jim
I don't have anything to add except that 1911 coin looks kinda cool. Where is it from? I can not find my catalog of world coins. Thanks.
Thanks Jim I am debating buying the Verdigone. The open forum offer is no longer valid. Apparently, Wizard is the only distributor but they don't carry Biox which also intrigues me. Or maybe I should just dump everything that is irritating me as is! Italy 2 Centismo 2 cent like you
Prior to purchasing anything for the only purpose is to clean a coin, THINK. You will now spend money traveling somewhere to purchase a chemical. Or you will buy something on line and pay postage and handling. You now have spent money just to purchase this STUFF. Now you have to have a place to use it. If it is combustable, best be a really safe place. Also, you read how you must rinse with distilled water. More stuff to buy. Need a glass dish or something to put that stuff in safely. You now spill some and ruin a rug, tile or a table cloth or on a favorite chair of your wife's. Your wife is now ticked off at you. You two start an argument about that stuff. She now tells you she wants a divorce and she will take everything and you can keep your silly coin cleaning stuff. Or you could just sell those on ebay and all is OK again.
Diamonds don't rust~But the mount can Diamonds don't rust~But the mount can. It's best to have a common enemy with your worthy opponent. Every item has a problem if you just keep banging on it.:hammer: :whistle:
