Reply by DaleM

I do sand between coats, not to rough it up, just really light to knock down any dustnibs or any “goobers” that might have been in the lacquer. 400 grit would be fine for this. I do not clean out the gun between coats. I just use a small brush that I dip in lacquer thinner and brush over the tip to remove any hardened lacquer around the tip before I spray the next coat. If you don’t, you sometimes get a small amount of hardened lacquer around the tip that could affect the spray pattern, or come loose and end up on your finish. That’s the only hazard I see to not cleaning between coats.

-- Dale Manning, Carthage, NY