MIL-STD-186 Protective Finishing For Army Missile Weapon SystemsThis standard establishes the minimum requirements for procedures, materials, and systems for cleaning, plating, painting and finishing metals, wood, electronic materials, parts and assemblies for rockets, guided missiles, and components to protect them from deterioration.

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MIL-STD-186F (MI)

Masking tape used in the application of insignia and markings shall be removed as soon as practical to avoid staining of the painted surfaces.

5.5.4.10 Application of luminescent material. Luminescent material shall be the phosphorescent or fluorescent types and applied as specified by the supplier.

5.5.4.11 Application of walkway material. Walkway material shall be applied as specified by the manufacturer.

5.5.4.12 Use of masking tape. Masking tape used in the application of insignia and markings shall not impair the properties of, or discolor, the paint film when such tape is used in the particular painting process employed. Absence of these defects shall be verified by examining the painted surface after the tape has been removed and the surface exposed to sunlight for not less than 48 hours. Verification is permissible on test panels and should be conducted prior to large scale masking applications.

5.5.4.13 Miscellaneous requirements.

5.5.4.13.1 Tack-ragging. To insure that all areas to be painted are free from foreign matter, they shall be "tack-ragged" immediately before painting. The "tack- ragging" shall be accomplished on each area to be finished immediately prior to the application of finishing material to that area. Tack-ragging is more applicable to those surfaces requiring sanding to obtain aerodynamically smooth properties.

5.5.4.13.2 Cloths, tack-rags. Only clean, soft, dry, contaminant-free, lint-free, desized, wiping cloths shall be employed in all steps of surface preparation,

chemical surface treatment, cleaning, tack-ragging, and painting operations. Use of commercial rental wiping cloths is prohibited. Laundered shop cloths are permitted when the following conditions are met:

(a) The cloths returned from laundering shall be only those originally

sent to the laundry by the paint shops of the contractor or overhaul station. Suitable marking by permanent marking inks or dyes shall be employed to insure segregation and return of cloths used for paint shop purposes.

(b) The laundered cloths shall have a complete absence of any trace of silicone-type material as determined by laboratory tests, including Soxhlet extraction.

5.5.4.13.3 Touch-up. The use of aerosol spray cans of finishing materials is permitted for touch-up of scratches and heads of fastenings, as well as small areas not exceeding four square inches. When necessary to touch-up or refinish a bare spot on an assembly, the edges of the finish adjacent to the bare spot shall be tapered by sanding. Surfaces previously treated with chemical film shall be touched up in the damaged area with brush-up type 1A treatment in accordance with MIL-C-