I have been experimenting with faux wax encaustics recently in my own art and with my students.  In the examples of my own art here I have used a combination of collaged magazine, map, and decorative papers, with drawings and painting.  Then I paint on melted wax (a combination of paraffin and beeswax) over the top.  Once the wax dries, I use a dull pencil to carve out some lines and patterns and then I rubbed acrylic paint into the grooves and wiped off excess.