Originally Posted by MARTINSR
Brad, read this comment of Ray's again, THIS is all you need to understand. THIS is it in a nutshell, and brilliantly explained, the results changed so you didn't do it the same, end of story.
Isn't that exactly what I said? The cause is something that I did not recreate?
While I don't necessarily believe in the sanding dust or silicone either, it is likely as you say: a combination of things making the perfect storm. If the waterborne dry time was the single cause, I think I would have seen something with this test. The "perfect storm" is hard to prevent, but a single fix like giving the waterborne and extra 15 minutes is quite easy.