Verifing paint thickness coverage

[rbhall]

Does anyone know a good product to verify block fill and latex paint coverage? As a third party inspector I have been ask to verify coverage. I do not want to stand around and verify coverage per a 5 gallon bucket. Any suggestions?

 

[TomDOT]

Hold points, visual evaluation, WFT gauge for nondestructive, or P.I.G (Tooke) for destructive verification, material consumption versus surface area and wastage factor depending on application method.