What Is Best Way To Decontaminate Indian Head Cents For Storage/Display

using olive or grape oil isn't the best choice. both are organic and can be reactive. they get sticky over time. mineral oil will do a better job.

proceed with caution. most coin conservation advise is somewhere between inaccurate and malicious. the good coin doctors dont share their methods very often. start with the ugliest and least valuable. do one and wait months to see what happens. take before during and after photos.

maybe post some pictures of the coins you are thinking about "conserving" and see what the coin community thinks of the idea.

i do some coin conservation from time to time. it took me close to a decade of practice before I stopped damaging coins.

here is a thread about a coin that I did some cleanup work on.

http://goccf.com/t/429618

Just to be clear:never clean coins.
ONLY use 100% pure acetone,not standard nail polish remover.
Practice on junk coins first.
John1

Separate out all of those the may have even the slightest hint of verdigris. Special treatment needed for these. Museums regularly deal with this problem, with copper and bronze objects of all kinds.

For bulk lower grade coins,
soap and water is OK to remove loose dirt and oils, but they must be rinsed and dried thoroughly with fresh water, then rinsed and dried again with distilled water. Because the soap and water has cleaned your hands as well, gloves not needed.

Acetone OK, but not warranted for most coins in this case.
Acetone is only effective for removing organically soluble gunk. Acetone in most cases will not remove inorganic gunk.
The reason why acetone is favored, is because it will never do any harm, even if it is not the right solvent.

Olive oil is not the way for IHC's, only occasionally used in particular circumstances for ancient coins. Olive oil is slightly acidic, and will darken copper and bronze coins with long period soaking.

And what do you rub it with? Cotton fabric?

With less than AU coins, rinsing them with plain water OK, then when most of the dirt removed by rubbing with with wet fingers in soapy water works well.
Because your hands are clean and skin softened, the coins will be OK.
Rinse with distilled water to ensure all soapy water is removed. Pat coins dry with soft towel or rag. Allow coins to completely dry out both sides before store or display in albums.

This has been my approach to cleaning dirty coins for more than 50 years, never had a problem with less than AU coins that have seen circulation.