LQ, Just to annoy you, which Marder?
SdKfz 131 Marder 2
SdKfz 138 Marder 3 Ausf M
SdKfz 138 Marder 3 Ausf H
SdKfz 139 Marder 3
Moderm Marder 1A2
He, He
I'm quite partial to this scheme for the IIIM: http://matte.where-i.net/GuestGallery/Wirbelwind/Marder3m3.jpg or: http://klub.chip.pl/krzemek/marder3/sdkfz138m3.jpg
For the 139, Panzer Grey under winter whitewash - give yourself a challenge.