I’m just taking a stab in the dark here, but I’m guessing that in the last stage of the glassing schedule the Coil guy’s are using a textured vac bag, which rather than dimples has little bumps all over the inside of it. Flip the switch, suck all the air out and the bumps get pressed into the still wet resin. Remove from the bag when it’s cured and the repeat on the other side. I’m guessing that they’re not even sanding the boards much once they pull them out of the bag for the last time, just some rough edges here and there.
Like I said, pure conjecture, I have no idea really.
Hey DPSUP, the dimples aren’t really round are they? More elliptical, right?
That's correct Gaff, here is a close up pic so you can get a better look at it... Attachment 7455