Aerosol - if you using spray cans from a big box store, the problem may be that it's really not lacquer. Look at the label and if the solvent for cleanup is anything other than lacquer thinner, the product is not lacquer. I just saw a "Lacquer" label that recommended mineral spirits or Xylol for cleanup which means it's oil based, even though it flashes quickly. Clean your piece up by sanding or scrubbing with a solvent, apply a couple of wet coats of dewaxed shellac to seal out any residue from the previous finishes, when dry (about 20 mins or so) sand with 400 grit, tack totally clean, apply lacquer sealer, sand, then black, sand and clear. Lacquer "bites" into the previous coat, so it should never peel off. If you are using spray cans, a small investment for a siphon gun and a small air compressor will make your life much easier.
If you get "blush" (moisture entrapment), add one drop of castor oil (sometimes two are necessary) to your spray cup, stir thoroughly. This will act as a "blush retarder" causing the lacquer thinner to flash off a little slower. Castor oil is much cheaper than commercial blush retarder. By causing the thinner to evaporate slower, the residual moisture will be evaporated also. You may need it in the black coat, but if you apply the clear within a short period, you should be OK.
Last edited by randyb01; 03-10-2013 at 12:13 PM.