I love watching cartoons and I love when they feature cool science gadgets. In an episode of Spongebob, Patrick and Spongebob buy invisible spray to pull pranks on people. They spray themselves and as they become invisible and pretend to be ghosts. They mention it's a paint that stains clothes and is washed off by water.
In the future, would this be feasible? Is it too much like clarketech? I know invisibility can in principle be achieved through meta-materials, but could a aerosol spray or paint achieve the same effect?