Frostbitten flesh

I recently decided to pick up Vampire's for my next fantasy army and planned a Kislevite Theme for them. So far I haven't had any luck with the things i've tried to get a frostbitten effect for my zombie test models any thoughts or suggestions are welcome, so far i've tried elf flesh, bleached bone and rotten flesh with a blue wash and white highlight.

Have you tried a light blue, then a slight drybrush with skull white on the larger areas? Or you could also use elf flesh. This should make any exposed wounds stand out more against the blue flesh.