I created a OpenScad Painter's Triangle for elevating an object while painting. I provide a minimum contact to the object. It is also stackable. The OpenScad code allows you to customize the height and width the triangles.

Enjoy.

4may19: updated to add blunting at the top of the triangles. I good woodworker friend of mine said to poked little holes with the sharp points. So i blunted the point to do no harm.