Well not ideal, but considering my frame of mind yesterday, it's come off better than expected.
Attachment 10884 Attachment 10885
The Nullabor Ochre seems to have come through pretty much unscathed, but I've gone through the Black Stump pretty thoroughly in a few places.
I've put on another THIN coat of intensifier to ascertain how well the Ochre fared, but I'm going to have to break out the Feast Watson on the black.
The weird thing is, I've put on heaps more coats of black than ochre, but I only sanded through the black...