Watercolor paper on poster board. Approx. 5" x7". The yellow-orange hue is from commerical watercolor markers ("Crazy Art") placed in water to get the ink. The dye is mixed with water-based 'Eco' hair gel . The green is from... 'foodcoloring' mixed with Benjamin Moore 'Advance' water-based alkyed linseed oil. It dries slower than acrylics , but faster than oils with linseed oil proper. It will 'dry' over a few days.
No turpentine, no mineral spirits. I will cover the design with a cold wax formulation to protect the markers delivered with the hair gel.