These are always a good place to start: http://bsdi.usppp.com/wwiiscalemodels/schemes/panzertarnung.html
http://klub.chip.pl/krzemek/galeria.htm
http://www.ww2resources.com/GERMANAFVs.html
http://byrden.com/panzers/Colours/
http://www.missing-lynx.com/articles/german/kkmarder/kkmarder.htm