Soaking (water only) - 1915 Cracker Jack?

[1880nonsports]

having soaked hundreds of N, T, and trade cards - rubbing even to the slightest degree can remove some of the surface AND if there already was an abrasion - the loss would likely be worse. Different issues used different paper stock and so the quality and densities reflect those differences as do the fronts and backs of many cards.
Full disclosure - I have never soaked a Cracker Jack (or a watermelon for that matter).
I believe there are a couple of archived threads about soaking and another thousand about what is an alteration. Similar information on the non-sport side.
I would only add to the DRYING admonitions. I always used a few sheets top and bottom of simple computer paper - pressed under of 5/6 weighty books (not the cerebral kind). I changed the paper after about 15/20 minutes and every hour or so until it seemed that the cards were mostly dry to the touch. I then changed the paper again and left them overnight. I changed the paper again the following day and left them about a week - looking in after a few days. That was to insure they were all the way DRY and wouldn't subsequently warp. I always kept the books on them.
Don't soak too long, warm water, don't rub, handle wet paper VERY carefully, dry completely.....and if possible test prior or listen to someone who's done it.