MIL-DTL-14072F
3.9.3.1 Unspecified colors. The use of colors other than those specified in Table
II or the equipment specification shall require the prior approval of the contracting
officer.
3.9.4 Final paint film selection. Paints shall be selected in accordance with the
following requirements:
a. Bake-drying and epoxy films. Except as noted in "b" below, only baking
type or epoxy base coatings shall be used for the painting of metallic parts. When bake
type coatings are used, the minimum baking temperature shall be 121°C for not less than
45 minutes, or 149°C for not less than 20 minutes. In no case shall assemblies containing
plastic parts be baked at a temperature in excess of 121°C.
b. Air-drying films. Air-drying enamels shall be employed for touch-up and
field repair, for parts too large to be baked, where the baking temperatures used adversely
affect the required performance of the finished part, or for painting wood, plastics, or
other materials which might be damaged by specified baking temperatures. Air-drying
enamels shall not be used for touch-ups and field repairs on CARC or lacquer finishes.
c. Engines and other heated areas. Engines shall be cleaned and treated as
specified herein and painted in accordance with the applicable engine specification.
When cleaning and painting of exhaust manifolds, exhaust pipes, mufflers, and other
parts subject to temperatures in excess of 204°C is specified in the applicable engine
specification, the paint shall conform to MIL-P-14105 or TT-P-28, as applicable.
3.9.5 Painting conditions and methods. Painting shall be done in a well lighted,
ventilated, protected area that is clean and dry. All painting equipment shall be properly
maintained and kept free of oil, dirt, scum, residues, etc. and shall be free of moisture just
prior to painting. All finishing materials shall be thoroughly mixed. There shall be no
stratification or separation of materials during painting operations. Materials shall have
the proper consistency in accordance with the applicable specification(s) and be suitable
for brush, spray, dip, roll or other methods of application being used such as electro
coating of CARC primer per MIL-P-53084.
3.9.6 Welding, soldering and brazing. Unless otherwise specified, welding,
soldering and brazing shall not be permitted on an assembly after it has been painted with
CARC finish(es). If it is necessary to perform one of these procedures after an item is
coated, the finish must be completely removed to the base metal in all areas which will
reach 204°C or higher. For the same conditions, this procedure must be followed for the
backside if it is CARC painted. Three recommended methods for removal are plastic
media blasting, the use of a paint remover such as MIL-R-81294, Type I, or the use of a
surface grinder and wire brush combination. After the procedure is finished, the stripped
surfaces shall be cleaned, pretreated and repainted.
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