About 36 hours later, I had a few spare minutes to check on the models. I could see that the paint had started to separate from the models.
I carefully removed the models in an effort to reduce the amount of residue left in the solution. The effects of the first 36 hours of soaking were obvious.
I lifted a good part of the paint away with a toothpick.
I then used a toothbrush to gently scrub off some more of the paint, and then I rinsed the models in fresh water.
The models were ready for their second soaking, and I was ready to do something else.