uses for drywal compound
its nice to use when connecting a hill to the game board, to give it that smooth look.
also to cover up foaw so when its sprayed with primer it doesnt get eaten.
also as stated above, throwing sand in gives it a nice texture.
the only problem i have with it is knowing if its too little or to much when i cover foam. once sanded down to desired smoothness level i usually find gaps in it wher it reveals foam! anywho...
hope that helped a little.