If you work for a Fortune 500 company or study at an engineering university, check your internal library portal. Many large organizations have "ASTM Compass" subscriptions that allow unlimited downloads.
What are you evaluating (powder coating, automotive paint, etc.)? astm d2794 pdf
For detailed information, including the exact methodology, calculations, and interpretation of results, one would typically refer to the official ASTM D2794 document. If you work for a Fortune 500 company
A standard weight (tup) is dropped through a guide tube from various heights onto a coated test panel to induce an indentation. Apparatus and Requirements etc.)? For detailed information