Expert Tips
I am actually a bloodhound when it comes to odors, especially chemicals/smoke. I have many tips for removing various smells from various materials.
For something like paper cards, even with a light coating, I would put them in a long plastic box with unscented clay kitty litter for several weeks. They should not be touching and kitty litter on all sides of each card, or flip and rotate.
(After they are fumigated, I would leave the box's lid open for a few days or a week to air out.) I usually keep this type of box out of the way on the garage floor.
The other thing you can do is to spread them out in your garage with your car parked inside for about three weeks or so, until the smell is gone. The petroleum particulates, from the car's tires, oil, gasoline, etc., break down other chemicals. I use this for clothes, too, that have perfume from the department store and formaldehyde from the manufacturer. Make sure each side is fully exposed.
Maybe you can simply wipe them down, depending upon the surface of the card. Natural mint soap, really breaks down chemicals.
There are some great sprays that work for breaking down substances, but I wouldn't use them on a deck of cards.
Best of luck.