Venetian plasters are a strong wall finish that is durable, making them a good choice for designers. Many of these finishes are smooth and resistant to dirt. The traditional mixture of lime and marble will over time “age”, “cure” to make a surface as hard and durable as marble.
The building surfaces that are used today must be carefully considered as movement underneath the finish can result in cracks. Two coats of lime plaster and sand were used to cover the original walls of Venice. This provided a solid surface to apply the marble plaster finishes. This would be the substrate that would be the weakest link in the structure, if plasterboard is used on dry lining or stud walls.
Although the finishes can be sealed with natural beeswax once they have been made, it is recommended that you keep them free from dust and rewax them as necessary, usually every two years. The extra protection of waterproofing or paraffin wax should be considered if the finish will come in direct contact with water and dirt.
These should be cleaned immediately after sealing. The water should not be used to remove any dirt and grime that has build up over the years. If the plaster has become compromised, it will only serve to spread dirt. Special cleaning paste can be used to wrap the dirt around and allow it to be cleaned up. The surface should then need to be rewaxed.