Hi,
You might get a dusty of white mould, which you can leave for a bit and brush back. I've never had caerphilly "soften" as some of the books say it might. You can age it, but personally, I prefer it in the 3 to 6 week zone. If you want a cheese for slightly longer aging, go for a Lancashire or Dunlop, both of which are good at 2 to 2.5 months. For even longer aging, gouda, cheddar, cheshire, and so forth. I've been told that Dunlop ages well, and I did keep a piece for 4 months or so. It was quite nice. Haven't aged a whole cheese out though.
Also, ignore the books about waxing before 3 weeks. If the cheese is still moist it will just stay wet under the wax (as my 2nd Wensleydale die.
- Jeff