I have recently started using foam board to tape on my paper as I was finding masking tape peeled off my mdf board. The foam board is turning out to be great.
I start out my abstracts with acrylic paint, often left over from a previous painting, applied with a sponge brush in large, sweeping strokes and here and there some scrubbing.
My next layers often include adding stencilling through lace or stencils and drips of paint
In my final layer I have added brush marks where the colour blocks meet or blend.
I have used gold acrylic paint in this piece which doesn’t show so well in the photo.