Go to Sherwin Williams and buy their clear lacquer. I have used tons of it for finishing furniture (wood) and it always works great.
Or you might try visiting a cabinet shop and buy a gallon from them as it's hard to get in gallon or smaller quantities.

I used a compressed air spray gun to apply it and never had any problems. I also have a Campbell Hausfield Airless sprayer. Don't know why its called airless cause it uses air...... Guess it's because it has it's own turbine type air compressor and doesn't use a separate air supply.
If you use a compressed air spray gun be ready to invest some money in a large compressor as those guns eat air like it's free.

After spraying lacquer on anything be sure to clean the gun real well or you won't spray any more. Lacquer thinner is the only thing that works for cleaning.

Another good point is to go and buy a filter respirator and wear it!

Lacquer really stinks up the place so do your spraying outside the house. Oh, and no open flames around this stuff.