When teaching acrylic painting, I often demonstrate the effects of adding various mediums to achieve certain looks. Such as moulding paste and heavy gel mediums to add volume to the paint, hyde glue or crackling paste for cracking the paint and sand mixed into gesso for a rough texture or to sculpt a 3D image. I also demonstrate how various papers can be used to give painting surfaces texture. My students are often in awe and excited with the results and eager to apply the techniques to their own paintings.
Another appealing aspect of acrylics is the low cost for start-up supplies. Many of my beginning students choose to start with acrylics because of this. My supply list for beginners is very simple and affordable. I start them out with the three primaries plus black and white, two brushes, a flat and a round, and their choice of watercolor paper or canvas board. All other mediums and additives are items they can purchase as their budgets allow. Since many of my students are children, the parents are very happy with this approach.