I'm using shellac on a workstation-desktop with a lot of surface area (~22
sq ft, in three separate sections). I'm new to shellac, but so far its
working great, except that I'm getting some small ridges, pits, and tiny
irregularities on each coat. Nothing huge, and I'm sanding them out easily
But with that much surface area application and sanding between coats take a
lot of time. I'm padding, and I've got 2 coats of very thin shellac (<1 lb
cut), and 2 coats of 2 lb cut. I'm figuring on 1 or 2 more coats of 2 lb,
then final sanding and polishing.
How much sanding between early coats? Jewitt's books says "lightly sand
between coats w/ 320 grit". Does "light sanding" mean just knocking the
gloss off, or does it mean taking each coat down to flat surface w/ no
ridges or irregularities? How important is it to get out all the
irregularities between coats? If I just knock the gloss off and sand and
polish the final coat, what difference will it make?
If the early coats are sanded to a near-polish, does it make any sense to go
back to a 1 lb cut for the final coat(s), assuming the 1 lb cut will flatten
out more than a 2 lb cut?