TOUCHUP AND RECOATING.

TM 43-0139 3-14. TOUCHUP AND RECOATING. a. When touching up damaged areas, the procedure should be as similar to the original method of finishing as possible; a clean surface is imperative. If the old finish is in good condition, clean the surface with a compatible cleaning solvent and apply the topcoat. Where general disintegration of the surface is evident, or the under surface is corroded, the coating must be stripped clean from the part. Corrosion must be removed or neutralized by mechanical or chemical treatment, or both, and the surface metal must be penetrated, primed, and then topcoated. b. Camouflage CARC coatings can be applied on MIL-P-53022, MIL-P-53030, MIL-P-23377, MIL-C-46168, MIL-C- 53039, MIL-C-22750, and fully cured alkyd surfaces. All of these surfaces must be clean and free of all contaminants such as oil, grease, fuel, hydraulic/transmission fluid, wax, carbon deposits, sanding debris, water, and fingerprints. Clean surfaces should be tested using the red litmus or water break tests. CARC cannot be applied over lacquer. All lacquer painted items must be stripped down to the epoxy prior to applicable of CARC. c. Camouflage alkyd coatings can be applied over enamel primed substrates such as MIL-P-52977, MIL-P-52999t, TT-P-636, TT-P-664, TT-P-1757, TT-E-485, or enamel topcoats as long as the surface is clean, dry, and fully cured. Alkyd paints cannot be used over previously CARC painted surfaces. d. The primary method for determining whether equipment is currently painted with CARC or alkyd is to examine the area near the equipment data plate. The word "CARC" or "ALKYD" should be stenciled nearby. For equipment without a data plate, thoroughly wet a rag with acetone (i.e. fingernail polish remover) and briskly rub the painted surface for 20 seconds. Evidence of actual paint removal onto the rag indicates an alkyd painted surface. 3-15. TARGET MATERIAL. Target materiel is generally governed by the policy that wooden parts destroyed by bullets will not be painted. Timber frame-supports of sliding targets are, however, given one coat of commercial red paint. The pulleys, sash cord, sash cord clamps, roller brackets, rollers, slide racks, slide irons, and hook bolts of sliding targets are not painted. All parts of the car and track of rolling targets for machine guns, and all parts of sled targets, except snatch blocks, ropes, staves, and pasteboard targets, receive one coat of commercial red paint. 3-16. ENGINE, ENGINE ACCESSORIES, ENGINE COMPARTMENTS. a. General Instructions. CAUTION Mask intake and exhaust ports, breathers, etc., carefully to prevent dust, solution, water, or metal conditioner from entering the engine. (1) CARC should be used on all surfaces, interior and exterior, of tactical (combat, combat support and ground support) equipment where the temperature does not exceed 400"F. This would include engine compartments, for example. The type and color for interior should be specified to facilitate maintenance or human factors engineering considerations. (2) Engines, engine components, and powertrain assemblies which are normally painted should be painted consistent with (1) above. For areas that exceed 400"F, paint should conform to MIL-P-14105 or TT-P-28, as applicable. Generally, this means that exposed engines (e.g., on a roadgrader) or engine components should be painted with MIL-P- 14105 in a camouflage pattern compatible color. Otherwise TT-P-28 or the manufacturer's coating would be acceptable, because there is no high-temperature CARC. (3) While the intended use of MIL-P-14105 is on ferrous substrates, it will work on aluminum, but the performance limit of the coating (1400^oF) is well above the melting point of aluminum. TT-P-28 has a performance limit of 1200"F. Neither coating should be used with a primer. Change 3 3-12