This miniature is painted to represent a Knight that had started his career in the Republic Auxiliaries and so decided that his paint scheme would be to honor his beginnings in the RAF. I used Vallejo Grey Green with Vallejo Med. Blue. For highlighting I mixed in white to get my highlights.
Knights of all ranks are permitted to choose their own paint scheme for their equipment, or they can use a standard black and silver design.
Per Field Manual: 3085, p.179