Then I got help. Our friend Julie is the artist. She came to the paint booth and helped lay out the paint line for the wave. Turned out to be a lot harder to get it smooth and looking good, then we thought. I tried it by myself one day and gave up. I'm not counting that wasted 2 hours.
Eventually we got the line on both sides. I called it good enough and painted.
There have been many times during this painting process where I have said, "good enough." "Don't fix it." "Keep building."