Re: microballoons.
Are you only dusting the PD, or providing a snowy base? If base, I recommend making snow clots (like a mud clot). Add water down elementary glue and make a slurry with the MB and let a pile cure on a flat surface. When dry, break pieces off (it's kind of between chalky gypsum and a snow cone). Creates nice chunks. Practice some trial runs - takes a few times to figure the right consistence.
Love your PD Lee,you and Guy did a great job and sharing on this thread,really appreciated.
Honestly,without you and Guy's sharing,I'll never confident to tackle this naughty boy