I was just reading the zinsser shellac data sheet and it states. This high building solution seals the wood to create a surface that can be easily sanded.
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Wood finishes and sealers can generally be divided into two categories.
Is zinsser shellac dewaxed. The final coats of shellac needs to be a dewaxed shellac so you would have to clean yours and then put down another coat or two of dewaxed shellac. Forum members suggested oil based stain blocker by zinsser. This product is not going to give you any durability as a finish coat.
The form of shellac used by woodworkers as a finish is formed by dissolving flakes of shellac in an alcohol solvent. Shellac as a woodworking finish what it is. These traditional finishes are found in a vast.
Dont know why your current finish is clouding but this product can be used as a bonding layer if you want to try something else for a top. But they also have this shellac base stuff that is advertised as a stain blocker. I did a little sample minwax poly over zinsser amber shellac and it seems to look and feel fine to me.
To the average person shellac probably invokes many negative perceptions. Build something extraordinary with our large selection of quality shellac at rockler woodworking and hardware. Poor water and heat resistance difficult to apply poor drying and low durability are all criticisms that i hear when i mention shellac to my clients or other woodworkers.
Yes you can poly over shellac. This is a sealer that will bond with most any other product like lacquer or the poly you have on there now but is really designed to be used with a top or finish coat. Solvent or oil based and water based.
Shellac is a resin secreted by the female lac bug on trees in the forests of india and thailandit is processed and sold as dry flakes pictured and dissolved in alcohol to make liquid shellac which is used as a brush on colorant food glaze and wood finishshellac functions as a tough natural primer sanding sealant tannin blocker odour blocker stain and high gloss varnish. Trying to paint varnished trim without the bleeding of that brown color. We do not recommend poly over the shellac it also says that polly is ok over the zinsser sanding sealer product.
Shellac a traditional finish still yields superb results. Solvent based finishes are shellacs lacquers and varnishes which use no water in dispersing the resins that constitute the finish film. Universal sanding sealers 2 pack saves time when finishing porous woods.
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