I have quite a lot of Himalayan birch which I felled last year, left in my garden for most of this year, then cut in to bowl blanks a few months ago, since when it has been sat in crates in a cold, damp garage. When I cut it into blanks there was some (not much) spalting to most of them. I sealed the end grains with wax at the time.
On moving them into my workshop yesterday, I noticed that nearly all of those that still have bark on are exuding a white foam-like substance from the lenticles, which I presume is fungal hyphae. Small darkened patches are visible underneath the wax on many (I'm pretty sure they were "clean" when I sealed them). A couple have an unpleasant looking slimy green decay on the flats, but I suspect this is a separate, local infection.
I'm hoping that this is side effect of a pretty but benign spalting process, but I've no experience in this sort of thing. I plan on rough-turning the lot of it next month.
What precautions should I consider before/after rough-turning the stuff to halt the decay?
Thanks!