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How to Restore a Black Slate Clock

How to Restore a Black Slate Clock

Priory Polishes, Slate Blacking has been specially formulated to restore and revive antique Black Slate Clocks, Black Marble Clocks, Hearths and Tiles etc. Below you can learn how to restore a black slate clock easily.

Black Slate Clocks were originally produced in Britain to mourn the loss of Queen Victoria’s husband, Albert, Prince Consort. These lovely little antique clocks were placed on the mantle piece, but because they were above a fire, the heat made their finish become dull over time.

Priory Polishes Slate Blacking is a strong black stain / finish that darkens and polishes the surface back to its former glory.

Directions for use –

  • Firstly remove all the movements. Removing the movements is usually very easy by unscrewing small brass screws on the back, it is possible to restore with the movement in place but this makes the task more difficult and you get a better finish with them off. It is always best to break down the clock into as many small pieces as possible for a better finish and to avoid staining the glass / brass areas. Remember, place the movement and the small screws in a safe place as they are easy to lose.
Remove the movement from the slate black clock
Remove the movement from the slate black clock.
  • Now the movement has been removed, you need to clean off all the existing grime from the surface. The slate must be free from dirt, grease etc. for the Slate Blacking to work correctly. To do this, use White Spirit. Wipe over the whole surface with a clean cloth (if it is very dirty use ultra fine 0000 priory polishes wire wool) It is very important that you dry the case well, whilst the surface is still wet, then leave for a couple of hours to dry before applying the Slate Black Renovator.
remove dirt using white spirit and wire wool or cloth
Remove dirt using White Spirit and Wire Wool or cloth.
  • The next stage is applying the Slate Blacking. First and most important, shake well before use. If any inlay or brass-work is visible, you may want to protect this by covering with masking tape before applying. It is best to wear gloves to prevent staining on your hands and protect your clothing. The Slate Black Renovator should be applied with a clean lint-free cloth or sponge on to the surface. DO NOT rub in, but try to apply as evenly as possible. A soft bristle, small paintbrush is ideal to get into all corners and awkward areas.
apply the slate black renovator with a lint free cloth
Apply the Slate Black Renovator with a lint free cloth.

The minimum of two coats are recommended but allow drying thoroughly between layers (leaving several hours between coats).

  • When the Slate is dry it can be carefully buffed up with a soft duster. For further protection and to add a more durable seal along with a nice even sheen apply a light coat of Priory Medium to Dark Tones Wax Polish. Leave for ten to fifteen minutes to dry and then buff off the excess with a clean lint free cloth.
finish by waxing your slate black clock
Finish by waxing your Slate Black Clock
  • Carefully fit the mechanism back into the case and secure the movement to the back. Make sure the figure 12 is at the top and do not over tighten the screws as you do not want to round the heads of the screws. For future maintenance don’t forget to oil your mechanism using our Priory Clock Oil.
restored slate black clock
Restored Slate Black Clock.

These are some of the products we used for this process

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