I actually did a copy of the last supper on a board for sonfollowerssurf using a d!ldo and ink!
that raises an interesting question: would Wayne accept a surfboard for his recruitment/indoctrination camp if he found it's artwork objectionable? and let's face it: there is prolly far more objectionable content than acceptable content in Wayne's world.
I don't believe in surfboard art, I am not good enough of a surfer.
I did however once spray paint "not good" on the bottom on my board whilst drunk and doing ding repair. Need less to say I walked everywhere with my board facing away from everyone until I was able to mask it.