First, a little back story: I lost a hive over the winter of 2010-2011. In the spring of 2011 I installed a new package of bees which didn't take (absconded). So, I have lots of drawn out comb/honey that I can feed to my new package bees which are due to arrive in the next couple of weeks. I know it is generally okay to use/feed back old combs and honey, and I'm going to put the frames I intend to use in the freezer for 24 or more hours to take care of any wax moth. But the look of some of them makes me a little nervous. Here are a couple of photos (they'll get larger if you click on them):
I think the white debris is crystallized honey, the yellowish-red pollen, but I'm not sure about the black? Any ideas? Are they safe to use or should I start from scratch?