I would not suggest spraying that large an area with rattle cans. Nor would spraying that much lacquer or varnish from rattle cans be cost effective. A quart of varnish will finish 45 sq ft. and cost much less than $100. You could wipe on the varnish or brush the first 2 coats then sand and wipe the last 3 coats (equivelent of 1 brush on coat). I only recommend poly on floors; where it belongs. There are much better varnish available that are harder than poly which is tough not hard. If you want brand names Behlens, Waterlox, Pratt & Lambert #38, Sherwin Williams classic Fast Dry Oil Varnish.
Spraying varnish requires personal protection and covering anything within 20 feet of the spray area. The slow drying varnish will float everwhere and makes a sticky mess on all your tools. Spraying lacquer is not as bad for the overspray, (it is dry by the time it gets to thetable saw) but the fumes are much worse. Even the chance of a loud BOOM is increased with lacquer.
If i where doing this joj I most likely would not be spraying... too long to clean my spray equipment... also my A-A Airless uses almost a quart of finish to get the finish to the gun. Therefore this is too small for my spray rig.
Last edited by Scott Holmes; 05-02-2012 at 5:49 PM.
Scott
Finishing is an 'Art & a Science'. Actually, it is a process. You must understand the properties and tendencies of the finish you are using. You must know the proper steps and techniques, then you must execute them properly.