The second half of our mixed media class was about painting over the plaster/spackle texture.
First apply acrylic medium over the texture and let dry, unless you want the colours to immediately be sucked into the plaster. Then mix up colours with either acrylic medium or ‘glazing’ medium, and run the colours over the spackle texture. Here I used a coloured glaze, a mix of medium and paint (ultramarine blue and reddish purple), and applied it with a fairly soft brush.
glazing holyman painting
It is important to cover every single last bit of the white plaster, to keep the white edges of it from distracting the eye.
Once the glaze has dried you can then go over the textured areas with a ‘dry brush’, using a contrasting colour paint that is applied lightly to one side of the brush only, and then brushed over the surface to bring out the texture.