Varnish over Shellac?
  Re: RE: Varnish over Shellac? by Cooler (It is an error to th...)
You should always use dewaxed shellac for seal coats in finishing.

Waxed shellac is used as a top coat, not a sealer. 

Personally, I would not apply any finish over waxed shellac, regardless of what anyone says.

Zinsser Universal Sanding sealer is a commonly available dewaxed shellac.  All the others contain wax.

I recommend applying a coat dewaxed shellac over what you have before the topcoat. I'm not sure how you could remove the wax from the shellac once dried.

Keep in mind a finish can look ok for a while, then show signs of problems. Keep an eye on the legs.
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