I thought this was a great subject. Painting East of Madison, Indiana over this last weekend. There they were...slowly rusting away, but standing tall and prowd. The whites were still bright as they caught the early sun and the shadows slowly moved across the shapes. One of the other painters said they looked like wedding cakes. The 20"x16" was quite managable. About as large as I want to go for en plein air painting. The painting was completed in less than 4 hours.