The process has been around for decades,as mentioned it's a process of finishing a part with air and fine metal particals.The purpose is to give a part a consistant uniform finish an to remove and residual flash as well as give the surface a finish void of any irregularities.This process was used in most all military specs for part realiability.Most know that any type of irregularity in the surface of a critical part can be the beginning of a crack or other type of failure.With all this being noted with the new processes of finished material from casting,forging and billit parts seldem need shot peening.Also the quality of the raw materials made with the new techonology help eliminate inperfection in the product.This process also helped in materisl testing giving the part a visiable consistant surface to inspect with the different process such os x-ray,zyologo,and magnetic partical testing.