For those who want an even toothier Primer, Art Spectrum Colourfix Rough (aka Supertooth) is the answer.
Art Spectrum Colourfix Primer has a rough tooth, and is a 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. straight from the pot
All Art Spectrum Colourfix Primers can be intermixed, or tinted with Art Spectrum Inks or Gouache, to create new shades. The Clear Colourfix Primer allows the natural surface or underlying colours to remain visible, whilst providing extra tooth for more overlays.