Working on an Iris

I started a painting of an iris that I photographed at the Ingram Senior Center.  I am using an ultra-smooth canvas with five coats of gesso rolled and scraped on.  Each coat was sanded after it was completely dry.

This is a departure from my usual method of painting.  I am applying very thin coats of acrylic paint on a pure white canvas with no under painting.  The white of the canvas is reflected through the thin coats of color.  I hope it works out well!