Tip from a pro

I found this photo on flickr recently:

I commented on this photo to ask how the artist made it.

Here’s the response:

I use this stuff called oil board….

it comes in sheets of 24×36 and rolls 48 inch wide by 100 Feet!
http://www.msscllc.com/prod_bottom_pages/marsh/stencil_it/data_oilboard.htm

Awesome!  Now I know how the pros do it!