MIL-STD-171F
APPENDIX A
Selection of finishes. The finishes should be selected from this standard. The selection of finishes for any particular application should be made in accordance with the following recommendations or as otherwise indicated in this standard. However, final selection shall rest with the activity responsible for the end item.
Exposure classification. For application of finishes to materiel, surfaces are classified by exposure as follows:
Type I (Exposed). Type I surfaces are areas exposed to view when equipment is in operating or traveling conditions or areas not exposed to view but subject to combined direct action of climatic elements. Climatic elements including temperature extremes, humidity extremes, rain, hail,
snow, sleet, salt, laden air, industrial atmospheres, direct solar radiation, dust and scouring action of wind-blown sand.
Type II (Sheltered). Type II surfaces are areas not exposed to view during equipment operation and not subject to direct action of rain, hail, snow, sleet, direct solar radiation, and sand. For interior use for surfaces not identified for possible use in combat zones.
CARC coatings. It should be noted that the Department of the Army has mandated that CARC will be the specified finish for all painted combat materiel (tactical), based on chemical agent resistance, decontamination resistance, visual camouflage, spectral camouflage and improved durability. The material developer or design engineer should specify the CARC paints wherever there is the possibility that the exterior surface may be exposed to combat.
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