Decide on your design. Tape out anything on the card that you wnat to be white.
How To Make Shaving Cream Art
Spray a light layer of shaving cream larger than the paper or card you are printing. Use a spatula or your piece of cardboard to help smooth it out to a light layer.
Add a few drops of food coloring or liquid watercolor to the shaving cream.
Swirl colors around with a toothpick fo fork.
Print shaving cream colors by placing the card down in color and gently rubbing the back.
Pull the card up carefully.
Scrape the shaving cream paint mixture off the card with a piece of cardboard.
Let dry.
Optional Designs
Remove painter's tape.
Add extra drawings with paint marker or pens.
Notes
Acrylic paint can also work to make shaving cream art. You just made need to dilute it a little to get the look you want.
Don't overmix the shaving cream and paint. You want to see the marble look.
You can use as many colors as your want. Just be careful to not use so many that they will not mix well together.
You can print from the same mixture a few times before needing to add more color.
If there is a spot that you would like more marble paint on, just reprint that area.