Hitting a brick wall

Out Art Envoys have painted, repainted and scraped the wall they chose to send Hillary a "Get well soon" message on so many times now, they've scraped it down to brick.

They are usually pretty confident about their painting skills, but when I mentioned that I might send this as a card to Hillary from the H.C.A., they froze.

They have decided  to scrap this project and go visit The Cave of Hercules instead.