We found for parties the fire extinguisher was a good delivery system. And figured the ratio fairly fast to avoid marking everything. For large areas a venteri designed into a cordless leaf blower works. Either one can blow the colorants, the leaf blower can also distribute micas and glitters that would jam the valve in the extinguisher. Learned that the hard way.
You are welcome on my lawn.
Interest include reading, love to spend time with a good book. 3D printing and design. Lapidary and smithing both for jewelry and metalwork. Electronics and designing odd things that use microprocessors.
I am the servant of 1 kitty and happily married to my wife who is way smarter than me.
( She has the PHD )
tfr