Fi-103 (V-1 "buzz bomb")

Does anyone have a good reference for the upper surface color.  I am building the Bronco 1/35 kit for a friend in Wolfsburg who works for VW.  The majority of the V-1s were built by VW so accuracy is a must.  I am looking at RLM 71 or 82 from Gunge Sanyo.  Any direction to a reference will be appreciated.