Can you glaze over varnish?
Then, can you glaze over polyurethane?
You can change the tone of your cabinets -- without the hassle of stripping and restaining -- by glazing right over their existing polyurethane finish. A glaze is essentially a clear finish with added pigment that renders it translucent. Oil-based polyurethane and epoxy resin glazes work best on cured polyurethane.
Subsequently, one may also ask, is glaze the same as varnish?
As nouns the difference between glaze and varnish is that glaze is (ceramics) the vitreous coating of pottery or porcelain; anything used as a coating or color in glazing see (transitive verb) while varnish is a type of paint with a solvent that evaporates to leave a hard, transparent, glossy film.
Theoretically, almost any stain could be used as a glaze. However, most glaze formulations are thicker than stain to allow more control and manipulation of the color and tend to have more intense coloration, since very little glaze will be left on the surface. As with stains, some are fast drying and some slow drying.