As the name suggests, the Optimised Surface Preparation targets the entire process and this is a decisive factor. As well as maximising the performance of every individual phase of the process, each step has also been optimised to work perfectly with all the other steps. Mirka’s OSP abrasives are clearly marked with numbers, making it easy to know which disc or strip should be used for each step.

Disc number 3 is used for preparing the repaired area for primer by reducing scratches and expanding the feather- edge area.