Working with watercolour may at first seem strange and difficult, especially if you are use to opaque mediums such as oil or acrylic. The first and most obvious difference is the fact that watercolour is transparent. This means you must decide from the very beginning where the areas of white will be in your painting. The process for successful watercolour painting, is to avoid the areas to be left white and apply the lightest washes first, gradually working your way towards darker washes.