Watercolour Tip Of The Week (25th March 2005)
If you lose some of the 'lights' in your watercolours, one of the ways to
re-establish them is to use either pure white gouache or tinted white gouache.
Instead of this method, try using pastel pencils in several light colours. The advantage of pastels over gouache is that if the correction does not work, the pastel can easily be removed with a clean soft eraser.
Pastel pencils are made by several manufacturers, I use Conté and Derwent