Cleaning Presidential And Sacagawea Dollars

Try soy sauce for low value coins like them.

Just let it sit for two minutes on each side in a cup, then swirl it.
After that, you can take it out, get a little bit of the soy sauce on your thumb and forefinger, then rub it.

Soy sauce helps with the look.

And from that point on it will always be worth a dollar as an improperly cleaned coin.

If all you're worried about is skin oils, acetone for everything. I advise that step for all raw coins a collector acquires, anyway.

Not sure what you mean about skin oils, but once that turn black, they won't go back. mild hand soap and water to remove sticky nasty form them, and then any stuck on grime some baking soda water paste like you would use on jewelry should remove them. If you dont have a jewelry cleaner you can get a cheap ultrasonic toothbrush that takes a AA batter with a standard 3c motor with a vibrator bar on it and attach it to the side of a plastic cup to agitate the wat and baking soda.

Being a Pre$ and SAC jsut to have, not to get graded, they will stay fairly well after that if you just put them up like other coins. Just remember to rinse each time with distilled water, and dry them off so it doesn't leave a watermark.

The only reason have used 90$ isopropynol is for coins I intend to paint and want to have the surface well and clean for the paint to stick, and it was an SAC and the acrylic paint has been there for over 10 years with no flaking. No idea after this time what it looks like under the paint, but the edges of the coin don't look like they have changed much except for normal edge-wear. Probably because the edge has less surface area and wer able to dry better and the medical gloves I used to paint the coin kept buffing the edge. any tape I remove with rubbing alcohol from coins left the tape line on the halves, and those I spent long ago so have no idea what happened after, but the tape had pretty much done its damage so jsut not having the half keep sticking to my hand I sent it on its merry cleaned way.

No, I would prefer someone clean and enjoy a coin if that helps them further enjoy and spread the hobby, and instead stop school fron using coins as cheap ingredients for middle school science experiments just to destroy them because the school cant acquire a plain copper, nickel, or silver disk to play around with.

Not ever coin should be graded, and not everyone has to get their coins graded. Enjoy your coins and collection your own way be it in a belt buckle, as a hobo nickel or whatever, just do so in a fashion that allows others to enjoy coins without destroying their ability to collect them, aka melting them down for precious metal content. A dateless buffalo isn't jsut worth 5 cents in its poor condition, but is something someone else could enjoy that may have never seen one or held one. a filthy SAC will also reach that curiosity level in the future, and coins have an easier like now than they used to when the buffs came out. Any science major here know what the manganese content affects of the properties of a "golden" dollar coin over the long term?

IF nobody tried to clean coins, that Verdi-care wouldn't exist.