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Question:

how do i clean old aluminium coins with white metal stains?

10 Mark Jewish Getto Coins (1943).I am giving them as gifts to people, they are not for keeping so it doesnt matter if the value decreases! they are aluminium metal -what is best for cleaning them please?

Answer:

Very bad idea! You can ruin your stove doing thatUse a microwave if you don't have a proper panDon't put the foil in the microwave, eitherJust covering my bases.
I worked as a cook one summer vacation and cut the crap outta my hand on the teeth of a van-sized roll of saran wrapBut I have never been assaulted by aluminum foil.
Dangit,the carrot took my answer! The same thing happened to meYaknow,I've never dated a girl with better culinary skills than meKeep the stove fires burnin',Chaster,it looks great on the resume.
Cleaning coins is fairly riskyBotched cleaning jobs can make a very valuable coin almost worthless on the market, and actually do more harm than good to a coinDeciding whether or not to clean isn't easyCleaning goes in and out of fashion like any other trend; some years, cleaned coins are popular and other years, they're notOverall, serious collectors prefer natural coinsYou will often hear collectors talk about toningThat's just a nice way of saying tarnishOddly enough, an evenly toned coin with an attractive color can be worth more than an artificially shiny, polished coinToning, however, is not the same as dirt or corrosionLeaving these on a coin can cause even more damage to it over timeRemoving the dirt and corrosion will often leave pits behind in the surface, but at least there will be no further damage.

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