I am very careful with the drawing as its 90% of the work. It that is off, no amount of painting in watercolor is going to fix it. You can see here how I start thinking about exaggerating the yellow/orange reflective grounds with a complimentary purple/blue. One tip I learned the hard way is to buy 100%cotton paper and this is the first in the series in which I used it and i could feel the difference. Below is a picture of the manufacturer from England that I like. This is another one of the series that sold before the actual show.
Here is the final piece
And this is how the client framed it