Well, that sure as heck isn't what Burt and Mike demonstrate in their video...and what is described in the plans, chapter 3.
The micro slurry is RUNNY - more like molasses than peanut butter. The thicker stuff is called dry micro, and is used to fill holes, dings and areas such as the trailing edge over the peel-ply.
My completed center spar weighs 44 lbs - that seems comparable to other builders who have a reputation for excellent construction technique.
I'm working on my wings now, and if I tried to spread dry micro on the wing, I'm sure I would damage it because of the hollow portions and the need to press hard with the squeegee to move dry micro around.
Mike Melville's demonstration in the video shows him POURING the micro slurry on the foam, moving it around with light passes of the squeegee, then using firmer strokes to remove most of it. Then he lays down the glass cloth, pours on pure epoxy, moves it around the part until it is wet out, then squeegees off the excess.
I sure hope I'm doing this right! I had a couple of inspectors check my work a couple of weeks ago and got a "thumbs up" from them. They are both A&P's and one does fiberglass work for the airlines as his day job.