At a distance it just looks like shiny spots but up close it looks like blisters, it seems to be the new growth and it's not on every plant. Also, the leaves do not seem to be dying.
I wonder if I have overdone fertilizer. I add 10:10:10 periodically. I also have fed a few times with the fertilizer boca bob sells. Everything really seems to like it. I have also periodically used epson salts.
I've seen that many times before, especially on zukes. I've got some new zukes just up about 3 days ago and one has that on it's first real leaf. Very normal and I'd think some varieties even more so than others.
I'm sure glad to hear this news because two of my perfectly healthy squash have leaves on them like this! They are thriving, growing and happy, just have a speckled leaf or two. I won't worry about them now, thanks!