Last year I made a "Maurice" costume from the 1980s movie "Little Monsters" I am very proud of how it came out, especially the makeup.http://cdn.ebaumsworld.com/mediaFiles/picture/496624/423772.jpg
...and a link to the movie cover for good measure.
The "Monster Moles" were made by squirting fabric paint onto wax paper into little dome shapes and letting them dry completely before peeling them off and attaching them to my face with spirit gum. When you are making the dots, make sure to make extra in case some don't come out right.
Fabric paint will dry all the way through even if it's laid thick, and it's flexible when it dries too.
I've used this method for other crafts as well...they especially made great tiny eyeballs for dolls and some Christmas ornaments I made...