White grid in background

Other artists have been so interested in the web spray paint, I'm glad to help bring it back to the art scene. Some people asked what I used for the white grid on the background. I had a plastic "thing" - I think it originally came with fabric trim wound around it. I use it to spray through usually, but this time I wanted a grid look without covering the background. I painted gesso on it with a sponge brush. Then to make the impression I covered the plastic "thing" with deli wrap, and rolled over it with a brayer on top of the background paint. I had to really push hard because the paper is stiff.