For the graffiti removal with Tornado ACS protective clothing is not necessary. Due to the closed cycle and the vacuum no granules or particles are able to get to the outside. And the moment you separate the jet cap from the surface, the cycle gets interrupted and stops, as well as the blasting jet. That is why the danger to get hurt equals zero. Even while having the fingers under the jet nothing is going to happen. You can even remove nail varnish from fingernails without hurting them. This is something we always demonstrate on trade fairs.