Cleaning by magnetic crawler robot capable of operating on vertical and horizontal steel surfaces, fitted with a vacuum system for removal of wastewater and solid particles. Air driven from a central control system for the safety winches and integrated air motor drive system and capable of operating with water pressures up to 2’500 bar the system can easily remove paint, waxy deposits or rust debris. Relying only on strong magnetic force the robot is secure on the surface regardless of any disruption in air supply. The robot is capable of vertical and horizontal movement across the surface constrained only by the length of the hoses available.