Coatings have been designed in order to be applied to a clean surface. In the case of steel , if the coating is applied directly to hot-rolled (black) or oxidised steel, the adhesion and the corrosion resistance will be poor. Here at Omnikote, we will always include grit blasting as a part of our process on these substrates.
Visit the Omnikote Ltd website for more information on Grit Blasting Pre-Treatment Capabilities