Q: Is there any problem with using acrylic white for highlights, snowflakes, etc. on a watercolor?

A: White acrylic paint will adhere well to watercolor paper, but many watercolorists choose to use white gouache instead. The reasons vary. Gouache may be diluted with little effect on its ability to adhere to a surface, while acrylic paint is not as reliable when highly diluted. Another consideration is that some watercolor associations and competitions require that participating artists use only transparent pigments--the white of the paper is the only white allowed.