I started to put a shellac finish on a box and do not like the way it is going on. I used a 2# cut, and then proceded to put a 4# cut on the piece. I realizwed after it had dried that the 4# cut was to thick and heavy.
Now I want to remove the finish and start all over, Should I just sand the piece or should I wipe a liberal amount of denutured alcohol on the piece to remove the finish
Thanks for any help anyone can offer
Replies
The denatured alcohol will work fine.
While removing all of it is fairly easy with denatured alcohol and a bit of scrubbing (you have to get the shellac on the surface wet with the alcohol and keep it that way for a few minutes to get it to dissolve), I'd suggest sanding it out to level it if the box geometry permits.
You'll get a very nice finish that's glass-smooth if you start with 400, then progress through 600, 800, 1000, 1200, and 1500 grit stearated sandpaper, and finally polish the surface with automotive clear-coat "cleaner" (it's actually a very fine abrasive, not a cleaner). You'll have to be very careful around the edges - it's easy to sand through to the wood.
Thank you I'll give it a try this weekend
There is, by the way, a way to shortcut a little of the sanding. What you're after are the latter steps of French Polishing - you have to make a "rubber", charge that with alcohol, and rub the surface to smooth down the brush marks, drips, etc...
A traditional rubber (and the kind I use) is lamb's wool wrapped with 100% linen, with the excess cloth tied at the top. You can get lamb's wool at the drugstore (it's sold to cushion shoes for people with bunions), and 100% linen at the fabric store. If you choose to go this route, make sure you get linen made with 100% Flax fiber - there are substitutes that have substantial amount of polyesther to make it cheaper and easier to care for.
There are easier substitutes for the traditional rubber - you can wrap a linen handkerchief around a balled-up scrap of 100% cotton t-shirt material. In my opinion, they don't work quite as well, but it's easier to come by the materials.
There's at least one, possibly more articles on French Polishing on the FWW website - I'd recommend reading one of them before trying this technique.
As has been said, denatured alcohol will remove it VERY easily. If you use 0000 steel wool for the abrasive, you will probably not need any further sanding. But do be attentive to corners and get the "sludge"/shellac alcohol out of them VERY well. It will show up in your next finish coat.
This article by Jeff Jewitt may be of help when you go to re-apply the finish.
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