I got a webpage of my website dedicated to Spalted Wood. You can take a look at it here.
I use it all the time on my custom wooden models as its a wood that tends to generate the most interest...as in "what is that piece of wood."
I like to use Beech as the wood because it spalts the best and is very predictable, but any number of woods can spalt and I have a list of those on my webpage. Generally speaking its pretty easy to spalt wood. The biggest thing is torealize its a kind of thing that requires small pieces. Anything longer then 2 feet and you get some rather sparse splating in the middle.
I cut my wood into 2 foot sections. This is logs in the round, and not sawn into boards yet. I put these outside next to the edge of a woodsline/field and let nature work on them. In 6 months I roll the rounds over 180º so that the spalting is even. If its hot and dry where you live, douse them with water every now and then,though in Maine where its humid and wet,that is not needed. After a year I put the rounds on the bandsaw and make boards or blocks from the wood. You can also use an ax and a router to make flat boards from spalted wood.
Here is my web page on this...
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"