Just measure equal parts of powder paint and equal parts of water, mix, and apply. (fabifabu.com)
I'm using things other than paint in my work too, such as diamond dust and metallic powder paint. (creativeboom.com)
One of my favourite childhood recollections is of mixing endless rainbow colours from the huge tins of powder paint during our weekly painting lessons — I can still smell it now! (blog.folksy.com)