MIL-STD-171 Finishing Of Metal And Wood SurfacesThis standard establishes and updates general finish codes and serves as a general guide to the selection of suitable materials, procedures, and system for cleaning, plating, painting and otherwise finishing of metal and wood surfaces.

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MIL-STD-171F

Each coat of paint shall be dry before the application of a succeeding coat.  In no case shall the time allowed for drying be less than that specified for the recoating or self-lifting test (if specified) in the applicable specification.  For applications of Chemical Agent Resistant Coatings (CARC), see MIL-DTL-53072.

5.2.2.1  Unassembled parts.  When circumstances make it desirable, primers and intermediate coats may be applied to unassembled parts of an assembly, the final coat being applied after assembly.  Prior to application of final coat, all damage to previously applied paint shall be repaired and all soils deposited on the surface during the assembly shall be removed with a cleaner which will not damage the primer or leave an oil deposit.

5.2.3  Film thickness  Unless otherwise specified, the thickness of the dry paint film or one coat application on hardware items shall be as follows:

Thickness

  Specification                                                                         In mils        

Pretreatment coating:

MIL-P-8514                                                                       0.3-0.5

Primers:

Other primers (unless otherwise specified) Top coats:

MIL-PRF-22750                                                                 1.0-2.0

MIL-DTL-53039                                                                 2.0-3.0

MIL-DTL-64159                                                                 2.0-3.0

All other top coats, clear or opaque

MIL-DTL-11195

1.0-2.0

1.0-2.0

1/  For aircraft, film thickness shall be 0.6-0.9 mils.

Note:        Where multiple coats are designated in the tables for finishes the dry film thickness shall be multiplied proportionally.  One coat shall be applied by a minimum of one double or cross pass of spray gun.  One coat shall not be construed as one pass of the spray gun.

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