I suppose if you glued the cotton wool to the back of the business card/certificate/wallet card etc. (with, e.g. GlueStick) it wouldn't be too hard to laminate a bunch of them and then cut them apart with a scalpel.

As a follow-up, just before going to bed I decided to try again with the remaining half of my business card. I looked at the remnants of the "cotton wool" side and realised there was a fair bit of unburnt tinder. I pulled it off ("picked away at it" is a more apt description) and got a couple of "pinches" of cw. I tossed on a couple of wood shavings and struck another shower of sparks from the BM. This time (3rd time lucky?) I was able to ignite the paper on the business card; it burned for well over a minute, with the peak flame about 4 inches high for at least 10 to 20 seconds. So even after 2 botched attempts, there was enough cotton wool to get a decent fire going. <img src="images/graemlins/shocked.gif" alt="" />