Sneaky, Moldy, Master Bedroom Peekey

Working on a Master Bedroom overhaul. Dealing with the maroon crown molding and wallpaper border remnants. Yesterday we moved our furniture around and found a lot of extra square footage that had been squandered on our arrangement. I'm not ready to give too much away, but here's what I'm looking at:

Underneath the border where there were air pockets, black, ucky, surface mold had set in. I made a concoction of hot water, Mrs. Meyer's, and bleach to kill that stuff!