Can shellac be used under lacquer?
There are pros and cons to using shellac as a sealer/barrier coat under your lacquer. There are many pros. It increases depth and forms a barrier coat to seal in possible contaminants, promotes adhesion of the topcoat to the substrate, and etc.
Should you sand shellac before applying lacquer?
Sanding smooth will be easier before applying the topcoats of varnish or lacquer. But on smaller objects you could just use the finish as the sealer coat. It might not be worth the trouble to use the sanding sealer.
What is dewaxed shellac?
Dewaxed shellac is an ideal sanding sealer. It bonds tenaciously to virtually any bare wood or finished surface; it dries very quickly, sands smooth with the greatest of ease, and since it contains no stearates it provides a reliable base for any kind of finish going on top.
Can you apply lacquer on top of shellac?
Yes, shellac is a great barrier coat and wash coat, lacquer works well over it.
How long after shellac can I lacquer?
Shellac dries really, really quickly, depending on how thickly you’ve coated it. Generally, it can take as little as 2 or 3 minutes for a thin coat to dry. After which you can apply lacquer over it. But it rarely takes longer than 30 minutes for shellac to dry all the way through.
Do I need sealer before lacquer?
In fact, it’s actually better NOT to use a sealer. The sealer is used only because it’s easier to sand. Zinc stearate, the material with which the sealer is loaded so that it is easier to sand, softens the film and decreases the water resistance of the lacquer topcoats.
Do you need to seal shellac?
The problem with shellac, and part of the reason why it has fallen out of fashion as a modern wood finish, is that when used alone it is easily damaged by water and alcohol. To produce a lasting shellac finish, a transparent sealant must be put on top.
What is the difference between waxed and dewaxed shellac?
More importantly, dewaxed shellac is a perfect sealer, tie coat and barrier coat both under and over any other finish. Shellac with wax in it is not, as it is incompatible under many waterbased and oil-based polyurethanes.
Is Zinsser BIN shellac Dewaxed?
Both amber and clear Bulls Eye shellac have a natural waxy substance that interferes with the adhesion of oil-based polyurethane and water-based finishes. To address that problem, Zinsser created SealCoat, a dewaxed shellac, meaning it has the wax removed.
What finish can be applied over shellac?
Dewaxed shellac is compatible with water-based finishes like polyurethane. To add, it is often used as an “adapter” layer and can go over, or under, water or oil-based poly.
Can you seal over shellac?
Can I use shellac sealer over nitrocellulose lacquer?
To the original questioner: Avoiding contamination (fish-eye) is a good reason to start with a shellac sealer. With nitrocellulose lacquer, it doesn’t matter if the shellac is de-waxed or not. Zinser does make a product called Seal Coat that is a de-waxed shellac mixed to a 2# cut ready for use as a sealer.
Why would you use shellac under lacquer?
Usually shellac is used as a barrier between dissimilar coatings. Shellac is a good sealer, but I am wondering why you would want to use it under lacquer.
Is denatured alcohol or lacquer thinner better for cleaning shellac?
As far as your spray gun goes, denatured alcohol cleans up shellac better than lacquer thinner. Lacquer thinner kicks the shellac out of solution and you get little chunks that have to be manually removed (strip the gun and run a brush through the fluid passages).
What is nitrocellulose finish?
This finishing material is made of nitrocellulose combined with other resins (to promote flexibility, durability, etc.) dissolved in lacquer thinner solvent. The lacquer film forms and cures as the solvent evaporates.