So the other day I came across almost 10 rolls of Kodachrome 64 I still have. They've been in a freezer since they expired about 2 years ago.
I'm afraid of messing up Caffenol and blowing up my house, and I heard D-76 might work, so I tried a quick clip test (10 shots) with my OM-2 and some (not fresh) ID-11. I shot it at ISO 50, and developed it for almost 10 minutes.
I used water as a stop-bath (I'm going back to acid soon) and noticed the water came out brown-ish. I'm guessing this was the antihilation layer coming off? (I'm not that familiar with KR.) The white lines across the sides seem to be remnants of that layer.
The film came out quite under-exposed, so perhaps shooting at a higher ISO and/or changing developing times would be in order? Next time I will definitely pre-wash, I think that'll eliminate any nasty stains.
(I know there's a Flick group for KR in B&W chems on Flickr)