"Art Spectrum Colourfix™ Primer is a fine tooth, quick drying acrylic primer which bonds aggressively to practically any clean, dry surface - all types of papers (300 gsm or heavier recommended), canvas, card, ply, plastic, glass, timber, ceramic and metal. Art Spectrum Colourfix™ Primer can be applied with brushes, sponges, rollers etc."Primarily used as a fine tooth surface for pastelists, Colourfix Primer is actually a multimedia product. It can be used as a base for pastel, conté, acrylic, or oil.
I'm very happy with the Colourfix Primer painting surface. Thinned down with a little water, it dried to a beautifully fine tooth, and then I lightly sanded the surface with some 600 grit sandpaper just before painting. This has produced a perfect painting surface for me so far.
The Colourfix Primer doesn't need to be thinned, but the more you thin it, the smoother it applies. Visible roller patterns and brush strokes will be visible if you use it straight. This can always be sanded down, but I prefer thinner coats.
Because I have sanded the Colourfix surface, I don't feel the surface tooth will be damaging to my brushes. So far I have tried Rich Beige and Storm Blue Colourfix, and I plan to try Raw Sienna, Soft Umber and Terra Cotta next.
Art Spectrum Colourfix Primer - 250ml (~$14AU)