I used the first colour paint over the stencil (left hand side) which leaves some of the white surface of the canvas showing. I then flipped the stencil and used black paint on the remaining bit of canvas. I continued to flip and apply paint.
Time for a few stamp impressions.
I now have a background on the canvas - I may need to over paint to make it more black later.
Next step, is to make a similar effect on some card which I'm going to cut up into labels.
Using a bradawl to make a hole.
Threading with my chosen thread, and attaching to the painted canvas.