Spray coatings are used in aerospace applications to improve surface properties. The structural analysis of the coating is very important as failure can be catastrophic. Analysis is carried out to determine any de lamination of cracks, porosity and penetration of blasting grit or other defects. Most spray coatings are prepared using automatic polishing machines such as OmegaPol after careful sections with a precision cutter. The use of vacuum impregnation will offer support to the coating and prevent preparation damage.