Really pleased with the final piece. Although initially I was unsure of the crazy mark making, it did help break through the daunting whiteness of the paper and was fun. Image size 530 mm x 750 mm worked on 300gm Fabriano Artistico HP paper.
Detail 
Photo taken in sunlight 
Blended with water 
Water soluable pastels
Thanks Chris appreciate your feedback.
I really like it.