I did this last weekend. I had the wish to paint a truck and found this tutorial on YouTube. I liked the colors suggested. It was time consuming, it took around 4 hours in two sessions.
I made a mistake in the sky. I had to leave after the paint was on and as it dried the paper started to bend in the middle causing the blob of paint there. Normally I would have rescued it with a dry brush. But as mentioned I had to leave it dry alone. I maybe put some birds over it to cover the ugly part. Or I cut it into a panoramic format.
Paper winsor and Newton, A4 cold pressed, cellulose.
Painting was re uploaded because I didn’t like the initial photo of it.