MIL-C-490A (AMENDMENT 1), MILITARY SPECIFICATION: CLEANING AND PREPARATION OF FERROUS AND ZINC COATED SURFACES FOR ORGANIC PROTECTIVE COATINGS (11 MAR 1957) [SUPERSEDES JAN-C-490] [S/S BY TT-C-490]

MIL-C-490A (AMENDMENT 1), MILITARY SPECIFICATION: CLEANING AND PREPARATION OF FERROUS AND ZINC COATED SURFACES FOR ORGANIC PROTECTIVE COATINGS (11 MAR 1957) [SUPERSEDES JAN-C-490] [S/S BY TT-C-490].