(5)
Apply BMS 10-60, Type II base coat over the entire walkway. The base coat dry film must be 0.002 to 0.005 inches thick.
(6)
Allow the base coat to dry for 6 hours at 70°F.
(7)
Apply masking for walkway stripes and arrows (Fig. 701).
(8)
Use the Watson Traffictred as supplied by the manufacturer.
CAUTION: THE PREFERRED (DESOTO P1000 AND GRIT) AND THE ALTERNATE (TRAFFICTRED) FINISHES CANNOT BE USED TOGETHER. ONLY BY OBSERVING THE WHITE FINISH, CAN THE DIFFERENCE BETWEEN THE PREFERRED AND THE ALTERNATE BE SEEN. THE PREFERRED WHITE FINISH IS A SEMIGLOSS, WITH GRIT ADDED. THE ALTERNATE WHITE FINISH IS A FLAT WHITE, WITH NO GRIT. THE SAME FINISH TYPE MUST BE USED FOR TOUCH UP.
(9)
If thinning is required, use aliphatic naphtha.
(10)
Let each layer of nonskid finish dry for 30 minutes before you apply the next coat.
(11)
Spray, brush, or roll one or more coats to get a dry film thickness of 0.005 to 0.007 inches (6 to 8 ounces per square yard).
NOTE: Do not paint over seals
(12)
Spray, brush, or roll on the black Traffictred (arrows). Make sure the finished arrows are solid black.
(13)
Let the nonskid finish dry for 24 hours at 70°F.
NOTE: Apply the walkway coating within 48 hours of the base coat application.
504
May 01/98 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 51-21-151 Page 709
NOTE: You must remove the masking tape before the finish is fully dry.
504
51-21-151 Page 710 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/93
HEAT, WEATHER AND OIL RESISTANT INORGANIC PROTECTIVE COATING -CLEANING/PAINTING
1. General
A. This section outlines the requirements for application of weather, fuel, oil, solvent and heat resistant protective coatings. The coatings afford corrosion protection to 900°F.
WARNING: FINISHES, CLEANERS, STRIPPERS, AND SOLVENTS USED IN THIS SUBJECT CONTAIN TOXIC AND FLAMMABLE COMPONENTS. AVOID BREATHING VAPORS AND MIST. USE WITH ADEQUATE VENTILATION. PROVIDE APPROVED RESPIRATORY PROTECTION AS REQUIRED. DO NOT GET IN EYES. AVOID CONTACT WITH SKIN AND CLOTHING. USE PROTECTIVE EQUIPMENT AS REQUIRED. KEEP FLAMMABLE MATERIALS AWAY FROM SOURCES OF IGNITION.
2. Equipment and Materials
A. Turco 4181, or equivalent
B. Solvent - BMS 3-2, Type 1 or 2, or Aliphatic Naphtha TT-N-95
C. Abrasives - 100 to 250 (Tyler Series) Mesh Silica, Alumina or Silicon Carbide
D. Compressed air
E. Gloves - clean, white cotton or disposable polyethylene gloves
F. Standard spray painting equipment, or electrostatic spray painting equipment
G. Sermetel 249 and Sermetel 273 Catalyst
H. Buffing equipment - stiff-bristle brush, or soft brass wire brush, or soft cloth buffing wheel
3. Stripping
A. Immerse parts in Turco 4181 (1-2 pounds per gallon of solution) or equivalent at 190 to 210°F until coating is completely removed.
B. Water rinse.
C. Oven dry at 200 (+ 25)°F.
D. Prepare surfaces and re-coat per paragraph 4.
NOTE: The use of chlorinated solvents on titanium is prohibited.
500
Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 51-21-161 Page 701
4. Application
A. Solvent clean as follows:
(1)
Parts made from titanium or its alloys: Solvent clean with non-chlorinated solvent.
(2)
Parts made from ferrous alloys: Vapor degrease or solvent clean.
B. Dry grit blast with clean 100 to 250 (Tyler Series) mesh silica, alumina or silicon carbide.
C. Clean with compressed air to remove residual grit and any contaminants. Do not handle parts with bare hands following the cleaning operation. Clean, white cotton gloves or disposable polyethylene gloves must be used to avoid contamination of the cleaned parts.
D. Cover or enclose grit blasted parts until coating. Apply coating within 4 hours.
E. Using standard, continuously stirred spray painting equipment or electrostatic spray painting equipment, coat the parts with Sermetel 249 until a uniform gray coating is obtained. Ensure that the material is thoroughly mixed before use.
F. Dry the coated parts 30 minutes at ambient temperature. The coating shall have a uniform smooth gray color after drying. Apply one coat of Sermetel 273 catalyst to the coated area and allow to cure for 16 hours or 4 hours at 300 (+ 50)°F. Mask all adjacent finishes to prevent contact with the catalyst. There shall be no lumps or runs visible in the cured coating.
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