Oh, I didn't do that. How thick do I want to make it? How much/many
microspheres are needed to do a square foot?
You don't actually count them, they are ~20 microns in diameter. What
you do is purchase a bag of them from aircraft spruce (cheap). Make your
epoxy mixture, then start pouring in microspheres until you have a
slurry resembling thinnish peanut butter. Note, the color is a near match.

Yea, that's what I thought. I was just trying to figure out how much I
should order.


Don't forget, laying glass & spreading epoxy while fighting gravity is
messy business. If you can work it. Always try to figure out how to get
your work surface mostly horizontal.

I wondered about that. I've got a fork lift. Maybe I should weld some tow
hooks all around this thing so I can spin it.