The invention relates to a washable paint comprising about 2.5 to 10 weight percent of a high molecular weight polyethylene glycol having a molecular weight between 2,000 and 20,000, a water swellable clay in the amount of 0.5 to 1.5 weight percent; and a high molecular weight cellulosic thickener in the amount of about 1.0 to 2.5 weight percent, wherein the high molecular weight cellulosic thickener has a viscosity between 500 and 15,000 cps tested as a 2% by weight solution in water at 25.degree. C. using a Brookfield DV-II+ viscometer with a number 21 spindle and a speed of 2 rpm, and wherein the paint has a viscosity of between 5,000 and 50,000 cps tested on a Brookfield DV-II+ viscometer with a number 6 spindle at 10 rpm and 52.degree. C.

 
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> Fuel cell cooled by latent heat of water evaporation

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