Graffiti on brick wall

Hi there! My name is Mykaela. I have a commission to do and the illustration idea I had includes a wall with graffiti on it. This image is perfect, but I wanted to ask your permission to use it. It would be slightly manipulated in Photoshop and used as an illustration on the back of some outreach cards for the Salvation Army Lynn Corps. I really love this picture, and would be eternally grateful if I could use it! Just reply to this comment with an answer, and I will totally understand if you dont want me to use it.
Thanks!
(I would credit you, btw)