Hi all...I am thinking of using dewaxed shellac as a sealer on pine prior to painting. I am leaning toward flakes or powder because of the shelf life. Having never used either, I'm wondering what the procedure is for mixing, what's used in mixing and life span after (what isn't used up). I'm currently researching previous posts on the matter, but thought I would ask anyway.
Weight out an amount of flakes
Depending on the ďcutĒ you add more or less amounts of denatured alcohol to the flakes in the container of your choice so long as you can put a top on it. The flakes will likely come with chart to determine amount of alcohol, although itís easy to look up if they donít.
Wait a while for the flakes to dissolve, shaking or mixing periodically. I usually mix them up a day before I want to use them.
Use a paint filter and cheese cloth to strain out any undissolved flakes and use. You can put the shellac back in the original container for storage. If you need to thicken the mix, add more flakes, thinner add more alcohol.
You really canít screw it up that much. Once mixed they say you have about 6 month shelf life, although Iíve stored it longer than that. If itís old itís slow to harden.
Using shellac out of a can for a sealer would be far easier for what you want to do, but if you want to learn about shellac this would be a good introduction.
Shellac comes in far more colors and hardnesses then most woodworkers know about since theyíve only been exposed to the Zinser stuff. Look online for specialty shellac dealers, woodworking stores and catalog companies donít offer many choices. I say mix your own, get comfortable doing it and enjoy the world of Shellac.