Star Wars Snowspeeder [WIP – Power Generator, Cooling Fins and Insulators]

Prior to the first dry fitting using parts already painted, there was one further section of the snowspeeder to complete namely its power generator with cooling fins. But before I began work, something kept tugging at the edge of my mind and wouldn't let go. Then it hit me. Why were the snowspeeder's cooling fins painted in hues usually associated with insulating material? It didn't make sense to