How to Remove Old Alligatored Shellac from an Antique Clock Case
The restoration of a clock case with a shellac finish that has become alligatored is a delicate task and integrates historical preservation with precision work. Shellac is a natural resinous finish that, while traditionally having a striking first impression, deteriorates over time into a myriad of cracks reminiscent of an alligator’s hide. This article focuses on safe techniques for removing alligatored shellac from antique clock cases while ensuring the wood and original craftsmanship is preserved.
1. Recognizing Alligatored Shellac on Antique Clock Cases:
Alligatored shellac is a result of the oxidation process combined with age-induced, temperature shifts, and heat storage, which allow the shellac to dry and crack. Shellac cracking can highly detract from a clock’s magnificence, however, the wooden part remains undamaged. With cautious restoration, you can easily salvage cases and maintain originality.
2. All the tools and materials required for removing shellac include the following.
Make sure to have these materials on hand before starting:
- Denatured alcohol (shellac solvent is an alternative)
- Lint-free cloth (cotton or cheese cloth works best)
- Plastics scrapers (a must for wood scratching)
- Fine steel wool (#0000 grade for the finest polishing)
- Soft-bristle brushes
- Respirator mask and gloves
- Sand paper (220 to 400)
- Clean Water with a mild detergent
3. Safety Measures When Working with Antique Clock Cases:
Try to avoid inhaling fumes by working in well-aerated spaces wearing gloves and goggles while working with chemicals is safest. In order to avoid breakdown of parts, make sure clock mechanisms and other hardware are removed.
Take pictures of the clock for condition reference purposes.
4. Step by Step On Removing Previous Alligatored Shellac Application
Step One: Attempt a Small Test Spot
Proceed with softening the shellac by simply attempting a small test spot on some non nosy like the inside of the case. Use alcohol and some cloth to wipe it and let it sit for one to two minutes. If it is damaging the wood and shellac, you should stop and if not, carry on.
Step Two: Using Denatured Alcohol to Soften the Shellac
- Soak cloth in the denatured alcohol and place it on shellac for around thirty to sixty seconds.
- Do not soak the wood; it needs to be damp, so it does not get warped.
- If it rehydrates too quickly, reapply more alcohol and let it soak through.
Step Three: Removing Residue by Wiping or Scraping Gentle
- Using screws made of plastic, lift the softened shellac in the same direction as the wood strings.
- For more detailed intricate parts, use fine steel wool or cloth instead.
- Make sure to repeat this until all the cover is stripped away.
Step Four: Neutralize the Cloth and Surface
- Mix one tablespoon of dish soap with one quart of warm water.
- Remove alcohol by washing the case with a wet nap.
- Completely dry off everything with a clean towel.
Step Five: With 220-400 scrub the surface, and gently smoothen and sand the wood.
Always sand in the direction of the grain.
Dust should be removed using a tack cloth.
5. Steps in Refinishing the Clock Case after Alligator Shellac Removal
- Shellac Application: Apply dewaxed shellac flakes mixed with denatured alcohol to achieve the desired finish. Use a brush to apply light coats, buffing between each one.
- Other Finishing Options: For a subtle but protective finish, use tung oil or beeswax.
- Final Assembly: After the finish cures, the clock and hardware can be reattached.
6. Easy Mistakes to Make When Stripping Alligator Shellac
- Use of Strong Chemicals: Steer clear from acetone or paint strippers as they can ruin antique wood.
- Over Sanding: Heavy duty sanding can remove original carvings or the patina.
- Skipping Steps: Let all processes dry properly before moving to the next step.
7. When to Ask for Help from a Professional Conservator
Also, if detailed inlays or a damaged veneer window are present on the clock case, consult a professional. Professional conservators have specific methods of maintaining worth while preserving the piece’s authenticity.
8. Questions That Are Commonly Asked (FAQ)
Q: Can I remove shellac with vinegar?
A: No—Vinegar is not useful for shellac removal. Denatured alcohol is the most effective for shellac without causing damage.
Q: What measures can I take to ensure the protection of the clock case after I have carried out a refinishing process?
A: You have to remove it from direct sunlight and humidity. Use a soft cloth to dust it at intervals.
9. Conclusion: Your Clock Case Maintenance Strategy
Figuring out how to take out old alligatored shellac from an antique clock case enables you to reminisce constantly on a beloved heirloom. As long as you focus on caring, deconstruction of history will never be an issue as the beauty of the piece will be preserved for years to come. If you are a collector, or even an amateur restorer, ensure you have lots of time and care.
