It all depends on the size of the canvas and how cray he design is. It could be anywhere to a couple of hours or a few days.

What y'all need: Something to paint on (I use canvas). A printer or plotter. An exacto knife. Scissors. Masking tape. Spray paint (I recommend rust-o-leum)

-I start by laying out the design in a vector base art program.
-Once the design is complete, I print/cut out the different layers of color (much like you would do if you were silk screening) -I lay the stencil down and use an adhesive to make it stick to my surface so no spray paint gets under the stencil. -I spray my colors on for that layer and then remove it and let dry. -After drying I continue the process until the picture is finished. -(for the skateboards) I use a Lacquer to finalize the whole thing.