HEY!!! Another fellow metal caster!! Awesome!
I do the "Mulling March" with my greensand. Lay it out on a tarp. Stomp the crap out of it. Add liquid. Stomp the crap out of it. Do a squeeze test. Stomp the crap out of it. Adjust with more liquid or dry sand....Stomp the crap out of it.
You get the idea. Stomp the crap out of it. Stomp the crap out of it. Stomp the crap out of it. Stomp the crap out of it. Stomp the crap out of it.
You're obviously pulling up the sides of the tarp after each iteration of "Stomp the crap out of it" to make a good mixture, pile in the middle of the tarp and then flatten, make a pile, flatten, make....Oh for pity sake, you get the idea. BAHAHAHAHAHAHAHAHAHAHA