Is it ok to splatter paint an orthopedic cast?

Yes but no water! It is ok to splatter paint on the cast but remember, you can't get it wet or submerge it in water. Do not apply any paint remover. Also, never stick anything inside the cast. If you have an itch, try blowing cool air from a hair dryer into the cast or tap the area with a wooden spoon.
If kept on cast. I think you'll be okay. Make sure you don't get any under the cast....As then it might itch or burn.