Would this product be good for using on a canvas that was then to used with coloured pencils plz?
Yes, you can use coloured pencils on top of watercolour ground. There are different ways to apply the ground. For finer smoother layer use a soft brush or foam roller in thin layers, or for a more textured finish apply with a painting knife. This will give you an interesting surface for watercolours, gouache, acrylics, graphite, coloured pencils, inks and many more mediums.
Many thanks for your question.