Come up with an idea for your painting. Get some paper and a pen and start doodling. This is the best way to find an image for your board. If you have any artist friends, ask them about sketching up some ideas. Cruise the Internet for some clip art that you can enlarge.
After you find the perfect image, you will need to enlarge it so that it will fit on your board. This can be done by taking the image to a print shop.
Remove the wheels and spray paint the board a solid background color and let the paint dry.
Transfer the blown-up image to your board using transfer paper, carbon paper, or a transfer pencil.
Paint the image using your enamel paints and let the paint dry.
Shellac the board 3-4 times to protect the painting.