Introduction
This article summarizes the conditions and repair steps as presented. The restoration focused on removing degraded finish from the faux‑marble columns of a 1900 Waterbury Dallas clock and revealing the original decorative pattern beneath.
Initial Condition of the Clock
Darkened and alligatored columns
The faux‑marble column surfaces had darkened and developed an alligatored appearance from aged varnish or shellac.
Consideration of replacement
Replacement with contact paper was initially considered before attempting restoration.
Discovery during cleaning
Denatured alcohol dissolved the old finish, revealing a Portofino‑style faux‑marble design underneath.
Cleaning method
Steel wool lightly dampened with denatured alcohol was used to gently remove the degraded finish.
Final wipe‑down
A damp paper towel was used to remove residue after the finish softened and lifted.
Understanding the Finish Type
Shellac identification
The finish dissolved readily in alcohol, confirming it was shellac.
Faux marble, not Adamantine
The clock did not use Adamantine; Waterbury did not produce Adamantine cases. The columns were painted faux‑marble on wood.
Alligatoring cause
The cracking and darkening were due to aged shellac, not failure of a laminate.
Preservation value
Removing the old finish preserved the original painted decoration rather than covering it.
Case condition
The base of the case had been chewed by a rodent, and the movement was temporarily resting on the base during restoration.
Choosing a Compatible Top‑Coat Finish
Avoiding polyurethane
Polyurethane should not be applied over shellac because natural waxes in shellac can cause adhesion failure.
Recommended finishes
Old‑fashioned varnish, shellac, or lacquer are compatible options for top‑coating after cleaning.
Adhesion concerns
Polyurethane can have adhesion issues even over fully cured polyurethane, making it unreliable for restoration.
Maintaining authenticity
Shellac or varnish preserves a finish closer to what Waterbury originally used.
Finish clarity
Shellac or lacquer will allow the faux‑marble pattern to remain visible without clouding.
Restoration Notes and Case Condition
Case disassembly
The clock had come apart due to damage and was kept disassembled during restoration.
Base damage
The bottom front of the case showed chewing damage, likely from a rat.
Movement placement
The movement was temporarily resting on the base during cleaning and repair.
Column preservation
The restored faux‑marble columns were retained rather than replaced.
Visual improvement
The cleaned columns showed dramatic improvement compared to their original darkened state.
FAQs
Why did alcohol remove the finish?
Because the original coating was shellac, which dissolves in denatured alcohol.
Can polyurethane be used?
No; polyurethane does not adhere well to shellac due to natural wax content.
What finish should be applied?
Shellac, varnish, or lacquer are appropriate and compatible choices.
Is this clock Adamantine?
No; Waterbury did not use Adamantine. The finish is painted faux marble.
Why is the base missing?
The base was damaged by chewing and the clock was disassembled for repair.
0 comments