It is said by some, that you should never return to a watercolour painting and rework it. This follows the idea that watercolour should be fresh and precise on the first go, which is satisfying and represents watercolour at its purest. However ... some paintings which would usually be thrown away (I destroy about 70% of my work) seem to want another try. It's impossible to lift out and regain the white in most cases, but the darks can be darkened creating contrast, and the spare use of body paint (yes, it worked for Sargent) can really lift a painting. Here are three paintings I revisited last week.