Certified TestingExpanded AccreditationAAMA 501.2-09AAMA 502-21AAMA 503-14AAMA 511-08ASTM E 547-16ASTM E 783-09ASTM E 779-19ASTM D 4541 Expanded AccreditationAAMA 501.2-09AAMA 502-21AAMA 503-14AAMA 511-08ASTM E 547-16ASTM E 783-09ASTM E 779-19ASTM D 4541 ASTM D 4541 Standard test method for pull-off strength of coatings using portable adhesion testers.