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Author Topic: Shellac?  (Read 732 times)
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Beazld
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« on: June 12, 2018, 06:46:13 AM »

I have been doing a little woodworking (non-model related) and using some shellac for the first time.  Has anyone ever tried using shellac instead of dope for applying tissue to models?  The solvent is alcohol and it certainly doesn’t have the associated smell that dope does.  Just wondering...
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FLYACE1946
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« Reply #1 on: June 12, 2018, 09:17:00 AM »

I have no idea but hope to see someone can let us know. I just hope you use adequate ventilation and maybe run a test for us . Stuff is easy to find I would guess at Home Depot or Lowes perhaps Ace Hardware stores too. Let us know out here if at all possible. Thanks for asking too.

Allen
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spliffsecond
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« Reply #2 on: June 12, 2018, 11:20:13 AM »

I have used shellac to seal balsawood but never tried glueing paper to it.
Will try and report back.

Grtz free
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danberry
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« Reply #3 on: June 13, 2018, 06:59:55 PM »

You will find that shellac doesn't have a lot of desirable characteristics for your purposes.
It does have a shelf life.
It is not very waterproof.
Handling the dried product might get a bit sticky.
UV rays could present problems.
It isn't real durable as regards scuffing and scratching.
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NormF
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« Reply #4 on: June 13, 2018, 09:45:10 PM »

Never used shellac for aero modeling, but have used it in unrelated trades.

 As an apprentice foundry pattern maker, we used shellac as an undercoat/sealer on wood patterns. It fills very well and was compatible with lacquer top coats. As Dan says, it has a shelf life. When bad, it feels sticky when supposedly dry.

As a music teacher, I used it as a thermo set adhesive for glueing woodwind pads. Using stick shellac or flakes, melt with a flame and bond the pad. Kind of like using a hot glue gun. It also came in a tube, used for gluing cork to instruments.

It would probably be OK as an adhesive to bond tissue, used wet, like dope or dry, and ironed on, like Balsarite.

Try it and report back!

Norm
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lincoln
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« Reply #5 on: June 17, 2018, 01:39:07 AM »

My understanding is that it keeps a lot longer if you don't mix up the flakes until you need them.

People who don't like the smell of dope are heretics.

I'm now imagining a model done in French polish. It would be magnificent, and the fact that it wouldn't be able to fly is just irrelevant.
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duration
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« Reply #6 on: June 17, 2018, 06:28:57 AM »

Dope smells much better than shellac.

Louis
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spliffsecond
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« Reply #7 on: June 17, 2018, 01:37:33 PM »

An alcoholic might be tempted,
I prepare my shellac with 95 degree medical alcohol.
If I dont open the windows I get tipsy just from the vapors.
About shelf life, if kept away from moisture and sunlight
 the flakes can stay good for a very long time.
My batch is 20 years old and still works great.
Prepared it is good for one or two weeks

Grt free
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