There also in an entire sub-group project on this topic. So this thread is PERFECTLY timed 
Thread here: Regolith research subgroup
And the next meeting is this Monday!
Event here: https://awg.osdr.space/t/lunar-regolith-subgroup/2479
Contact @borjabarbero & @dr.richard.barker @rachelcrivero who i believe are leading this
You should see all the calendar invites for the AWGs you belong to here: https://awg.osdr.space/upcoming-events?view=month