This is called a wax resist... it is where I did a contour line drawing..(a single line creates the image without lifting your pencil at any point) and i use hot wax to protect areas of the painting.. I then paint over it with a wash of acrylic.. then once dry... I iron off the wax and there you go! I really like this piece... Some people wanted to buy it... and I was all like HAHA I DONT THINK SO!!! cuz its mine... and it turned out very nicely!! haha well yeah... oh and i did use a model for this one. Materials used model acrylic wash wax iron