Here I built up layers, to see the combined effects of sprays and oil paint together, first I used a layer of spray paint to create background interest and atmosphere. then I did layers of oil paint. Finally on the left side i did a concentrated area of spray, using similar colours to see how they would react. I found the combination worked well rather harmonious.

Based on the thorns and tangles of a blackberry bush, I primed paper with rabbit skin glue, and used oil mixed with stand oil, 

This time I applied the oil paint thickly, with some dammer varnish in parts.