Thank so much Ayin! I agree, it does look printed, and there is in fact an element of pressing at the stage of the process where I'm 'subtracting' parts of the second paint layer. Some of the 'back and forth' horizontal marks in the dark region below centre are caused by me rubbing the side of my knuckle across the paper towel and you can also see the impressions of the bumps in the towel.
I gave it the name 'Niche' because the top-centre part looks like part of the land surface that is ecologically separated from its neighbours, and when adding the small bright patches that I think were called for I couldn't help thinking of them as creatures emerging from crevices and making their first contact with each other.