I am new to using Lacquer and I need to spray a top cote on six dinning chairs. The chairs have several coats of 1# shellac sprayed on them. I was thinking one or two quarts of Deft Brushing Lacquer should be enough. However I can get a Gallon for $26. What kind of coverage can I expect using an HVLP gun? What is the shelf life of an opened can of the Deft Lacquer? Should I stock up at that price? Or are there other brands/products available at similar prices?

On another note. How much thinner should I use in this application? I have read anywhere from none to 50/50. What has been your experience.

Regards,
James