I think I'll get a feel for how it looks as I'm applying it - make the speckle decision then. Good points guys.
Took 2 more degreasing scrubs and 2 more acid etching sessions. Had to use almost a whole gallon of muriatic.
Now it has a sandpaper feel and should be ready for epoxy tomorrow.
Lol, the "2 hour" prep time Armor Garage claimed turned out to be 16 hours and 5 times the materials they sent me. Rather do it the right way now and avoid regretting it for the next 30 years.
Now it's nice and white. Just needs to dry over night.