The final step for my kitchen remodel was to give all of the cupboards a sprayed coat of varnish. Because the cupboard doors and drawers have to be sprayed outside (due to the mess and fumes), we had to wait until the summer months to do this part! This time, we were not only doing the cupboards that were refinished before, but giving all of the cupboards in the kitchen a fresh new coat.
The benefits of using a spray gun to varnish is that it gives a beautiful, even coat of finish. It also can make the project go so much faster than if you were to use a brush to put it on. The risk with spray varnishing (and with any varnishing), is that things like humidity, dust, or anything on the wood surface can cause a mess!