For the past 35+ years I have always used sifted Kitty Litter. laid it down and the basic water with a few drops of soap or better yet alcohol and then a 50/50 mix of Elmer's glue and water. Let dry and then I air brush some detail paint to it. Very inexpensive and fun to work with. Enlarge any one of the photo's I have posted here and you can see that the average size of the litter is 1/16 to 1/8 of an inch. Perfect size for me and I do get a lot of compliments on it.
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