Spray cans can work, Spraying with a gun is a touchy thing. Varnish, unlike
shellac or lacquer, does not have a solvent that you can run through the gun
to clean it even if it is cured. In other words you had best be diligent
about cleaning a gun immediately and thoroughly between coats and after
Add to that the time it takes varnish to cure out of tack, and even with
HVLP you do get some overspray , causing a sticky mist of bits of varnish
floating around the shop and spraying varnish with a spray gun can be a not
As someone pointed out spray cans can get pricey but they do a fair job.
However, if I were you, I would give some consideration to the method
outlined in Barry B's response to your post. It's one of my favorite methods
of applying varnish and it avoids a lot of what is a problematic finish to
The only real downsize is that it means the coats go on a little thinner and
it requires more coats to get the same build. In the long run though, since
you essentially side step a lot of the problems of applying varnish, air
bubbles, brush marks, drips and sags, it is actually less work.
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