Lacquer Sanding Sealer is another option that the guitar builder has available to them to ‘lock-in’ stain coats and prevent wood bleeding. These products provide high build, relatively clear, easy to sand base coats that save you time and provide a great finished product.
While a lacquer sanding sealer will build quickly and fill-in wood pores because of its bridging qualities, it wouldn’t recommend that you use it for that purpose. My experience has shown that using this product to fill-in pores in the wood produces some shrinking over a short time period and your incredible mirror finish will have the grain pores showing through.
Lacquer Sanding Sealer can be used successfully as a base coat layer. Just spray a couple of coats and sand in-between to provide a barrier coat and base for the wood filler, and future nitrocellulose finish coats. The sanding sealer sands much quicker than regular finish lacquer because of the suspended solids inherent in the product. It also maintains the a clear appearance of the finish, as long as you minimize the number of base coats.
I have used the Lacquer Sanding Sealers for quite some time before moving on to the Vinyl Wash Sealers. I was very pleased with the results from the sanding sealers, but felt that the Vinyl Wash Coats was just a bit better, clearer and easier to work with.
The Lacquer Sanding Sealer – What it is:
The Lacquer Sanding Sealer has a lubricant added to produce enhanced sanding qualities. While appearing quite clear, spraying more than a couple layers of sanding sealer will begin to cloud the guitar finish and may not produce a crystal clear finish. Also because of the suspended solids that give it the bridging qualities require that the sealer be thinned and mixed very thoroughly before use.
Another negative aspect of using too many coats of sanding sealer is the finish may tend to lift over time and the adhesion to the wood may degrade. The lifting of the sealer can be minimized by letting the sealer dry more completely between coats. Another negative effect of sanding sealer is that it tends to be softer than a typical lacquer finish.
Also if the sanding sealer is sprayed too thick, it will be too soft for the harder lacquer finish that follows it. This can produce cracks and crazing in the harder top coats and cause lifting around areas where the finish is compressed, such as the tuning machine area.
The Use of Lacquer Sanding Sealers With Fillers:
Sanding Sealer is a great way to provide a base layer for the filling operation. Just make sure adequate time is given to drying to allow for a hard durable finish. The sanding sealer will build quickly and sand easily and give a great barrier coat to exotic woods and stained woods.
Lacquer Sanding Sealer – The Advantages:
- Provides a very effective barrier coat and can be applied to nearly any surface without trouble.
- They sand much easier than traditional Nitrocellulose Lacquer.
- Drying is quick while provide a rather thick finish that bridges and builds better than traditional Lacquer.
Lacquer Sanding Sealer – The Disadvantages:
- Surface adhesion can be a problem.
- It does not produce a crystal clear finish because of the somewhat cloudy appearance of the product.