Beautiful, unwarranted spray-painted sidewalks might land you in detention with local law enforcement. Of course, why not have both? With the Sand-and-Spraychalk machine, you can! The Sand-and ...

You can turn this into spray chalk too! Fill your spray bottles with a half a cup of cornstarch. Add food coloring to a cup of water then mix into your cornstarch in the spray bottle for each color.

Using two Arduino Duemilanoves for the brains, this little cart features eight cans of spray chalk which can be individually actuated. Small solenoids pull down on levers in order to spray the cans.

Depending on the size of the object you’re painting, you can use a brush, roller, or spray gun to apply chalk paint. “I love how resilient chalk paint is when working over different surface types.

The Just Stop Oil (JSO) group said two of its supporters spray-painted with chalk "1.5 is dead" on the 19th-century biologist's grave in Westminster Abbey in central London. It follows Europe's ...