Q: Can epoxy go over shellac?
A: It depends on the epoxy. Most contain either alcohols or amines, either of which will bond to shellac, but because epoxy formulas can vary so widely, it would be best to either know more about the formulation you are using, or do a sample followed by a cross hatch [...]
Q: I am finishing some beech and used Zinsser SealCoat in a 50-50 mix with denatured alcohol. After light sanding I applied tung oil but the result was some serious blotching. I’m planning on using shellac as a finish.
A: Zinsser SealCoat is pure, dewaxed shellac, already reduced to exactly the right consistency. That implies two [...]
Q: I’m getting some shiny areas in the finish after four coats of satin lacquer, scuffing with 180 in between. The sealer over the pore filler is two coats of tinted garnet shellac. Over that is one coat of sanding sealer. I fear I’ve sanded through the lacquer and gotten down to either the tinted [...]
Q: I’m restoring a Martin guitar, and after staining, I added three very
light wash coats of 1lb. cut shellac. I’d like to strike the pores black
with Finishers Glaze seal with sanding sealer, fill pores with Bartley’s dark, seal and topcoat. Martin mahogany pores are darkened nicely. I’m trying to do it the right way.
A: I’m [...]
Q: We want to do a comparison of the performance of a variety of solvents for shellac:Lee Valley’s Shellac/Lacquer Thinner; a lab grade of denatured ethanol and common hardware store methyl hydrate. We plan to prepare samples of blond shellac, mixed in each of the three solvents, apply them to wood samples and test [...]
Q: I recently acquired an antique mahogany crib which I want to refinish for my one year old granddaughter. After some sniffing around on the web, no one seems to have a confident definitive answer on what finish would be safe. Can you help?
A: Virtually all film forming finishes, that is, those that harden to [...]
Q: I’m currently building an outdoor grill cart out of ash and obviously need to protect it. I was thinking about sealing with Zinsser and then multiple coats of an exterior finish. What do you think?
A: You did not say which Zinsser product, and only some of their primers are exterior coatings. For instance, SealCoat [...]
Q: You said we could glaze gold leaf. If we apply glaze directly over uncoated leaf, won’t it tear the leaf when we clean off the excess?
A: No. You simply wipe off the excess glaze immediately, while it is still liquid, using a soft cloth, or blend it using a very soft bristle brush. Neither [...]
Q: I’ve tried Zinsser SealCoat on wood turning as a sealer before wipe on poly. The finished result is outstanding; it did a great job of sealing spalted maple. For sanding, I use a 2″ disc in a cordless drill on low speed off the lathe with 400 grit paper. The sandpaper builds up with [...]
Q: I usually finish the soundboard of my classical guitars with dewaxed shellac. It has no color at all and therefore the soundboard ends up being very pale. I noticed all classical guitar sound boards are more toward a brown tint. My question is, do you think luthiers stain their soundboards only by using different [...]
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