Digital Bottle Cap Images Available

For those of you who scrapbook, or make hair bows, I have some of my Digital Bottle Cap images available on Etsy, individually, and in packages.

You can find my Etsy shop here. For the full listing of all my images, you can find them on my facebook page, here. Look at my photo albums- there are 4 individual albums for bottle caps.There are close to 200 individual sheets available, and only a small portion is up on etsy.

Looking For.... Bottle Cap Tutorial

Do any of my a-maze-ing crafty friends out there have, or know of, a tutorial on how to make bottlecap images?

The basic idea is sound- use clip art, put 12 to a sheet, get em printed on photo paper, use 1" round paper punch, punch em out, glue em, coat em.

But, since I've never seen an -actual- sheet, I don't know what size I should design in. Or, what the best top coat is for once the images are on the bottle cap. Would Mod Podge be enough, or should I use Epoxy?

Point me to your directions, I'm desperate!