Bare hands are fine. They survived several thousand years in soil, not much can harm them. Storage is more important for longevity, particularly for bronze coins. Bronze coins should be stored somewhere dry to prevent the chemical reaction with water that causes "bronze disease" (a reaction that literally turns the bronze into powder over time).
My hands are clean when I hold them...nothing like scrubbed before surgery or anything extreme. Just not dirty.
Clean bare hands. I try to hold them by the rim. Most important is to not drop them on a hard surface. They can be brittle and break.
I believe you are a hundred times more likely to damage an ancient coin dropping it from gloved fingers than you are gripping securely with clean fingers.
The first ancient I bought was raw.... and a fake. I stick with graded now. I feel like I've gotten good deals on them, and at least they are genuine (according to someone else's opinion, not fact, I know). Honestly, I am down to about 3 left. I've sold most for a small profit. I need to start shopping for some more
I agree with what everyone here has said. Even @jwitten. If I collected only ancients, I would keep them raw - maybe in nice Abafil trays - but since my "Eclectic Box" is a slab box I keep them in slabs. That does diminish some of the tactile joy of touching them ... with clean, bare hands, of course. But I do that before they're entombed in plastic. The subsequent owners can always crack 'em back out - or not - as they choose.
This is why gloves are usually prohibited when handling old books and manuscripts. Gloves are kept on hand for press photos only.
If Harlan J Berk will bare hand $30,000 in gold ancients at one time; I'll touch any of my lowly pieces without washing mine. Jump to 2:25
LOL That sounds like something you'd hear in one of those teen chick flicks. The OP Raw and bare handed, my rough ol workin hands.
If you just ate salty potato ships, wash your hands, and don't put lotion on them. As others have said, clean hands are good enough.
So, I should wash my hands after the BBQ ribs? I bet Julius Caesar himself handled his coins after some nice sticky ribs and corn on the cob.