Glueup and Shellac Question - Woodworking Talk - Woodworkers Forum
 
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post #1 of 8 Old 01-26-2020, 10:49 PM Thread Starter
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Glueup and Shellac Question

I'm making my out-feed /assembly table which has a torsion box. I'm planning on finishing the wood with shellac and I'm thinking it would be a lot better if I can apply the shellac before I put the bottom on it but know I can't put the glue on after the shellac.

If I am careful and keep the shellac about an inch away from where the glue is going to go I think I should be ok, shouldn't I?

BillF
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post #2 of 8 Old 01-26-2020, 11:37 PM
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Are you worried about squeeze out? I think people apply way too much glue sometimes.
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post #3 of 8 Old 01-27-2020, 01:21 AM Thread Starter
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Quote:
Originally Posted by Noek View Post
Are you worried about squeeze out? I think people apply way too much glue sometimes.

No, I'm worried if somehow the the shellac sealer finish as it penetrates the wood could interfere with the glue up and inch or two away preventing a good adhesion

BillF
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post #4 of 8 Old 01-27-2020, 04:24 AM
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My torsion box assembly table .....

I built a 30" wide by 10 ft long torsion box from 2 - 3/4 " thick countertop particle boards. For the grid, I used 1 X 3's all ripped to the same width, 2 3/4". I glued pn one edge at a time, then 2 center strips, then filled in all the rest of the grid on the bottom sheet. After the bottom had set up I applied glue to all the edges and laid the top down and clamped the edges and put heavy weights on it. I had to keep as level/flat as possible for the glue ups....






Here's the build:
https://www.woodworkingtalk.com/f2/t...sizing-104889/


I used a 3rd piece for the top worksurface which was just set on top of the torsion box, not glued or screwed down. It is heavy enough to avoid moving around, but it that becomes an issue, a few screws will hold it in place. I shellaced the top on both sides to prevent warping and to make a useable non-stick work surface. There is no shellac on the torsion box itself. The actual outfeed table with the miter bar slots is made from 1/2" MDF, a bottom sheet 18" wide and separate pieces spaced 3/4" + 1/32" for the miter gauge bars. No dados required in this method of assembly:

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #5 of 8 Old 01-27-2020, 09:30 AM
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BillF, You can pre finish with shellac prior to assembly...keep in mind that you should avoid areas where you will be gluing. Plan carefully.

Gary
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post #6 of 8 Old 01-27-2020, 12:34 PM
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Why are you using shellac?

Robert
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post #7 of 8 Old 01-27-2020, 05:15 PM
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You're overthinking things by a lot. Tape over any areas that are going to be glued later, apply finish, let dry, glue. No problems, just use a good tape.

Shellac is a good finish for some things, but a crappy finish for a work table. Far too delicate for an outfeed table, though reading your post is seems like you're trying to apply finish to the wood lattice making up the inside of the table? Veers a bit into the unnecessary side of things

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post #8 of 8 Old 01-28-2020, 01:47 AM Thread Starter
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My first three shop tool stands I finished using boiled linseed oil and was pretty happy with the outcome. Easy to apply and I liked the look. On this I decided to experiment after seeing a YouTube on shellac since I'm new at woodworking and it looked almost as easy to work with as the boiled linseed oil and had a really nice satiny sheen.
My results so far. I built the frame the torsion box sits on from HD douglas fir and before applying the shellac finish to the torsion box, since I never used it, I put it on the fir frame and was really disappointed. First off it was sucked up MUCH more than the boiled linseed oil and in my opinion doesn't look any better, and actually is hard to tell the difference between the two.
So I have decided to tape the edges to be glued with blue painters tape and finish the Baltic Birch plywood torsion box with the boiled linseed oil like my other stands.

It's waiting for me to apply the finish before attaching the bottom and flipping it over onto the stand.
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BillF
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