I thought I was at the top of my game, making these neatly trimmed, smooth as skin, drum-tight canvases primed with Acrylic Gesso that you could bounce a dime off of. Then I learned (thanks, Painting Materials & Techniques I!) that Acrylic Gesso was only one of the endless material options that could be used as a ground! What had always been taught as the default, go-to option, was actually just one choice out of so, so many. Acrylic Gesso, Clear Gesso, Colored Gesso, Acrylic Matte Medium, Acrylic Gloss Medium, Traditional Gesso, Rabbit Skin Glue, PVA Size, Chalk Ground, White Chalk Oil Emulsion, Pigmented Chalk Oil Emulsion, Oil Ground... I'll stop there.