Thanks.
The cotton balls have been rubbed in vaseline, and man do those
critters light. I only needed one spray of sparks from my firesteel
to pop a petroleum cotton ball into flame when I tested them.
That was in the fall, light wind and damp (just after a rain).
Going to test it in the snow tonight for kicks to see if I can
get something going.

Hopefully, I'll be able to take some pictures.

Cheers