I've been reading in Virgil Elliot's book about the 10 color-color wheel that places blue-green across from red. I had that in mind today as I painted over an old canvas with a still life. I am about 3/4's of the way done with it. The reflection in the table is too red. Covering up the pre-existing painting was more of a challenge this time than last time I tried this. I'll work on it again tomorrow.