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 d. Surface Preparation and Coatings. If the existing coatings show significant defects such as cracking,
peeling, and flaking, the entire surface should be cleaned to bare metal and repainted using the
appropriate procedure.
(1) Apply one coat of epoxy primer. Use two finish-coats of chlorinated alkyd-base paint on bulkheads
and overheads. Chlorinated alkyd-base paints are applied in the same ways as conventional alkyd-base
paints.
(2) Apply one coat of epoxy primer and two finish-coats on decks.
(3) Both sides of uninsulated fire zone bulkheads shall receive two coats of thermal insulating coating
compound. Apply the coating compound to the minimum approved DFT over properly prepared and
primed surfaces. Epoxy primers are acceptable primers.
(4) Apply one coat of epoxy primer and one coat of white epoxy topcoat to wet spaces such as
washrooms, water closets, bath and shower spaces, sculleries, and vegetable preparation spaces. Apply
as specified in paragraphs 6-2.a through 6-2.e to achieve at least 5 mils DFT.
e. Bulkheads and Overheads.
(1) Use non-flaming chlorinated alkyd-base paints for the overheads and bulkheads of living, messing,
and recreation spaces, and their connecting passageways. Paint fibrous glass board to match
surrounding structure. Finish-paint all other compartments in accordance with Appendix B.
(2) Interior deck colors may be carried up onto the bulkhead adjacent to the deck to a height of
approximately 6 inches. Paints listed in Appendix B may also be used for deck boarders in spaces where
rugs are installed. Interiors of weather doors may be finish-painted to match the surrounding bulkhead.
f. Painting Behind Equipment. Before installation of front-serviced electronics equipment, the bulkhead
and deck area should be painted with two coats of epoxy primer and finish-painted in accordance with
g. Decks and Walking Surfaces. Decks for which coverings are specified require painting where the
deck covering consists of false decking, gratings, rugs, or portable material. Do not paint surfaces of
aluminum or CRES. Deck Plates in main and auxiliary machinery spaces shall be painted in accordance
with Appendix B.
h. Acoustical-Absorptive Treated Surfaces. Surfaces treated with acoustical absorptive material shall be
painted with one coat of paint (unless two coats are required to achieve hiding) to match surrounding
structure. The paint shall be sprayed in thin coats and care shall be taken to prevent the paint from
bridging or sealing the perforations in the acoustical treatment.
i. Tanks, Bilges, and Voids. Tanks, bilges, and voids shall be painted in accordance with Appendix B.
(1) CRES, copper-nickel, Monel, bronze, and other copper-bearing metals are frequently used for
piping and for components placed in coated tanks. The metals act as strong cathodes in immersion
conditions, causing galvanic corrosion to take place at gaps (holidays) in the painted tank surface
(anode). Deep pits occur at paint holidays since small anodic steel surfaces are exposed to relatively
large cathodes of corrosion-resistant bearing metal. To protect against galvanic corrosion in immersion
conditions, both the pipes and the components should be completely coated with the specified tank or
bilge coating system, except where prohibited.
(2) Proprietary approved coatings shall be applied as recommended by the manufacturer or as stated
in the paint specification. The minimum surface preparation standards for epoxy coatings shall govern
when they conflict with less thorough requirements in the manufacturer's instructions.
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