Given all the caveats about getting it out of the comb, plus the somewhat acquired taste of ivy honey, I'd still personally leave it... Getting really solid honey out of the comb is a chore, and you can't just melt the whole lot, wax and all, without raising the temperature too high and spoiling the honey. You have to destroy the comb mechanically, losing the benefit of the drawn comb (which the bees could otherwise use again).
Heated honey is also dangerous to bees, so you can't reclaim it for feeding back to them in this way. Ideally, the thing to do with any kind of honey (usually oilseed rape) which crystallises quickly is to get it out of the combs ASAP, possibly even before it's been capped. Once it's in a bucket then you can relax a bit, because even if it sets rock solid there are various ways of blending and creaming it to make a nice honey.
If you're still keen to try and extract it and use it for "set" honey, you could try mushing it into a sieve and *gently* warming it so that the more liquid elements drip through into a bucket or pan. I've done this once or twice when saving honey from round the edges of brood combs that I was getting rid of. You can treat it like OSR honey, and let it set in the bucket, then warm it and cream it. The remaining crystally, waxy mess can either be "washed" to make mead, or just melted for the wax, discarding the sugary stuff.
The reason for choosing a fine-grained seed honey is because the crystals tend to form in the presence of existing crystals, and will be influenced by their size. If you don't seed it, you are likely to end up with an unpleasantly coarse, gritty honey that's only really suitable for cooking.
there's a couple of threads about crystallised honey that might be useful:
http://www.beekeepingforum.co.uk/showthread.php?t=10494&highlight=solid+honey
http://www.beekeepingforum.co.uk/showthread.php?t=9482&highlight=crystallised
It's tempting to try and melt the lot and separate the wax off that way, but I really wouldn't: by all means warm the honey to try and get it out, up to about blood heat, but getting it hot enough to melt off the wax is going to trash the honey (at least IMHO....)