Unless there is no doubt that the floor is finished with shellac you should test it.
Shellac over waxed floor.
The lightest traffic i tried paint thinner.
Shellac has wonderful blocking properties better than any other finish.
Shellac and wax is probably the most basic of all finishes.
When a small drop.
Bullseye shellac does contain wax.
The products and methods for shellac care could ruin the finish if it is actually urethane.
Shellac forms a hard brittle film and when applied over a softer more flexible finish like most wb finishes or oil base finishes it is prone to cracking.
Wax over shellac wood floor.
It blocks silicone contamination which causes fish eye odors for example from smoke or animal urine and residual wax extremely well.
Shellac in its natural form has wax in it about 4 content iirc.
Lacquer most commonly used as a sealer lacquers are favored for their low cost and quick dry time an undercoat of lacquer seals the wood in just 15 minutes.
Shellac is not compatible with most topcoat finishes so usually only wax is applied over it.
Keep in mind most of your effort should go into the preparation of the wood making the wood as smooth as possible through sanding otherwise it s like brushing varnish on the trunk of a tree with the hope of achieving a smooth finish.
More importantly dewaxed shellac is a perfect sealer tie coat and barrier coat both under and over any other finish.
Their sealcoat and the aerosol spray can shellacs do not contain wax.
Pour some dewaxed shellac into a glass jar and pour some shellac with the wax in another and look at them side by side.
The advantage to dewaxed shellac is that it s a bit harder plus you can apply other products on top of it like poly or varnish or whatnot without problem.
It s not a good idea to use shellac over a waterborne finish.