Take 4 canvases of each size), paint them a solid base color and add vinyl or stenciled design. stick decals onto canvases, paint the whole thing and then remove the stickers to reveal the wonderful artwork!
Textured Wall Art: A new take on string art, this colorful canvas has a great texture to it. We might consider using a matte paint for a more sophisticated feel. (via Blu Kat Kraft) Craft and DIY Projects and Tutorials
Line Easy DIY Abstract Art! different sized tape over white canvas. Then spray paint color of your choice. To prevent paint from seeping under tape, use a primer over the canvas, or you can just use touch up white paint when you remove the tape.