oh yeah, I didn't rewash it, no. For the reason you said, it's stabilized by this last adding of sizing. Fabric would be even more stretchy without it.
Maybe I should quanitfy the changes, I see it as big, but then I am nervous about my promises. If you weren't looking for the changes, and it happened all at one or over time by EVENLY, then it's not a big deal.
I had the benefit of seeing on of Karen's sample covers that got washed funny, and putting this in context, I am LOOKING for this stuff, it was obvious to me.
When I cut my french chair cover I left hills of excess at the leg openings, a half inch or more, as I cannot predict further shrinkage.
On a non washed ( remember it was prewashed, so it acts washed even with more sizing added ) a nonwashed piece of fabric wouldn't look right with all that excess. The Hob Nail just rolled and poofed, it looked fine to me to leave it there ( in case of shrinkage ).
Had I washed it, I still wouldn't know if I had gotten all the shrinkage out. And, this is a perfect case of, even if it came out of the dryer small, I could dampen and pull, and it would give up more size. It isn't absolute, like shrunk and it's gone.
Though I wish it were available at true wholesale, and I wish it sewed faster, I do trust this. I trust the Hob Nail a lot, I'd put it over any shape furniture that presents itself. I trust it to pull it tight, I trust it to come out of the washer and dryer and go right on. I would not, this early in my testing, dry in hot. Maybe others have ?