This SAE Recommended Practice provides procedures some procedure for determining shot penning coverage and relating coverage to part exposure to the media stream.. Effectiveness of shot peening is directly dependent on coverage. Either incomplete or excessive coverage may be detrimental to fatigue strength and life.
SAE J2277-2013 Referenced Document
SAE J442-2013 Test Strip, Holder, and Gage for Shot Peening
SAE J443-2010 Procedures for Using Standard Shot Peening Test Strip