Spray Painting of CARC Coatings

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Q:  I have a military job that I am trying to quote and have had problems finding a source for powder substrate pre-treatments per this standard MIL-C-46168 I would like to be able to provide this customer with the correct information as to our adherance to this spec.  They call for 2 coats olive drab per this spec. color # 34094 / 383 Green Fed STD 595 I assume as the top coat.  I found only the use as Coating, Aliphatic Polyurethane, Chemical agent resistant.  I have had no help from the powder manufactures that I buy from in this matter either.

A:  MIL-C-46168 is a liquid 2-component polyurethane coating, and it is a topcoat.  This polyurethane is usually applied over an epoxy primer, such as MIL-P-53030 or MIL-P-53022.  The surface preparation is either a phosphate (applied to steel) or MIL-C-5541 Cl 1A conversion coating applied to aluminum.

If you want to bid on an equivalent powder coating instead of a liquid coating, you might need to get approval to do so.  Unfortunately, I do not know of a powder coating that meets the spec, but that does not mean that a powder coating doesn't exist.  I'll try to get more information and get back to you.

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