I was given a great tip about pressing your pastels to hold the pastel dust on your painting, especially if you do not spray your painting with fixative. Put a clean sheet of paper, newsprint without ink is ideal, over your painting. Then cover with a piece of cardboard and press on the cardboard, lifting and pressing the cardboard as you go over your entire painting. When finished, carefully remove the newprint paper from your painting. (This tip courtesy of Robert Carston).