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Custom Fire Apparatus, Inc. <br />During reassembly of all individually painted fabricated components, special care shall be taken to <br />prevent deterioration of top paint coats of mating flanged areas. Fabricated accessory components, which <br />have been removed prior to painting, shall be seal coated where mated to dissimilar metal painted <br />components. Accessory fabrications to be installed using stainless steel button socket head cap screw <br />fasteners. Edges of accessories, where meeting exterior body painted fabrications, shall be properly <br />caulked with G.E. or equal silver metallic body sealant to prevent moisture accumulation between metal <br />layers. <br />TOUCH-UP PAINT <br />One (1), full quart of original finish color top coat paint material shall be provided for use as future <br />touch-up paint. <br />CHASSIS FRAME AND DRIVE TRAIN FINISH, TO REMAIN ORIGINAL OEM FINISH <br />The chassis frame assembly is to remain the color and paint quality as received from the chassis <br />manufacturer (OEM). The frame and drive train components are not be repainted. <br />Components that are considered part of the "frame assembly" are frame rails, cross members, axles, <br />suspension, steering gear and the fuel tank. <br />DISSIMILAR METALS CORROSION PREVENTION <br />In an effort to prevent "dissimilar metals corrosion" all apparatus ferrous and non-ferrous metals shall be <br />isolated from one another, using barrier tapes, vinyl or rubberized coatings, and other methods to isolate <br />the mating surfaces. Where aluminum and steel or stainless steel are "mated", the entire mating surface <br />must be lined or coated, even where surfaces are already prime and/or color coat painted. <br />Since all fasteners must be stainless steel, it is imperative to provide fasteners with the smallest possible <br />head profile, such as button -socket -head cap screws, in lieu of pan head or truss head screws. <br />Additionally, all screw and nut fasteners shall be coated with "Harpen Wax" to prevent fastener <br />discoloration when exposed to dissimilar aluminum. Rubber and/or vinyl washers shall NOT be used, as <br />they collapse as allow fasteners to loosen. <br />Where stainless steel piano hinges are bolted to aluminum, the hinge leaf shall first be lined with a brush <br />on undercoating. <br />ADDITIONAL CORROSION PREVENTION <br />In addition to the above specified corrosion prevention, the apparatus shall be assembled using ECK or <br />electrolysis corrosion control, on all high corrosion potential areas, such as door latches, door hinges, <br />trim plates, fenderettes, etc. This coating is a high zinc compound that shall act as a sacrificial barrier to <br />prevent electrolysis and corrosion between dissimilar metals. <br />07/26/22 <br />- 157 - <br />