Here's an example of the full-bore Cape Cod School of Art approach, done by the woman who was the last to head up the school and teach the techniques in Provincetown, Lois Griffel. Her book, Painting the Impressionist Landscape, is quite good in its presentation of the laboratory-pure Cape Cod School approach. I have a copy and I've learned a lot from it.
She is a consummate artist. But the exaggeration of color in the 'pure' technique is not for me.