You may already know this, but there are several different kinds of stamp pads for rubber stamps. There's dye ink pads (fast drying), pigment ink pads (slow drying unless set with a heat gun), fabric ink pads, "chalk" ink pads, and maybe some others I don't know about. All these are water-based. Then there's solvent ink pads - not water-based. They produce a more permanent image, but clean-up must be with a solvent - not water.
You may have to do some experimenting to determine which kind of pad will work best with these metal thing-a-ma-jigs, but surely some kind of pad will produce an image. I have all these different kinds of pads. I'll do some experimenting for you - if I can think of something metal to use.

I have enough rubber stamps to open my own craft store, but can't think of anything metal . . .
QUOTE(Paddler @ Jan 11 2008, 06:21 PM) [snapback]475310[/snapback]
. . . I think you use a regular stamp pad and put the paper on a soft rubber substrate.
Paddler
Yes, I think whatever pad you use, it will help to have a springy surface to stamp on since your "stamp" is made of hard metal.
Judybug