Would it be possible to can your paper and the print it out on kodak photo paper? That is thicker and will work better on caps. I am not really familiar with that type paper, but I think if you can scan it and reprint, it might help.
Also for glazing, I have a tutorial on my site at GreenHouse Butterflies Graphic Designs
and it is on the left side top. Click the link that says bottlecap tutorials.
Or use this link Bottle cap projects
If you need more help, send me an e-mail at email@example.com
and I will be glad to help you!