Do it yourselfer, News, The council of expert
29 April 2019
How to polish ruined marble?
Scratches, stains and marble dulling are the order of the day. Let's find out the best technique to eliminate these annoying halos.
We often hear about techniques and methodologies to polish ruined marble, but when we have to choose which is the most suitable to eliminate the signs of time and wear from our marble, the answer does not seem so obvious.
Marble crystallization, traditional polishing, sanding and many others, but what are the peculiarities and differences between these techniques? Which processing is more suitable for simple scratches and which instead for stains caused by corrosion?
Let’s try to find out together by reading this interesting article.
Marble and polishing
Unfortunately, like all materials, even marble has its pros and cons, those who have floors and worktops for a few years know it well.
Time is certainly the enemy of marble, in fact, year after year this splendid material suffers the signs of the inevitable deterioration.
This stone, as beautiful as it is delicate in fact, requires constant maintenance.
Scratches, stains but also natural opacity are on the agenda. The surfaces most at risk of wear are undoubtedly those found in the kitchen and in the bathroom, where it is easier for the material to come into contact with acid substances.
Fortunately, however, there are a lot of complex techniques to polish damaged marble and to restor its natural brightness and beauty.
But let’s try to find out what are the most effective stains and methods to perform a perfect polishing of the marble.
To polish ruined marble: where to start?
First of all, to understand which method to choose to polish ruined marble and achieve an effective result, it is advisable to ascertain the damage nature and extent, on the surface.
The intensity of stains or corrosion may be different and this is what will help us define the type of intervention to be performed. To polish ruined marble, there is no better method than another, but there is a precise state of the material that determines the best intervention to be carried out.
First of all, we try to classify the stains on marble following a scale of intensity: small, medium or wide depth.
3 methods to polish marble
Once the extent of the damage has been identified, we can decide which polishing method is right for us.
Traditional marble polishing
The term polishing means the process implemented to make a surface shiny.
To polish ruined marble, belt polishing machines and powders are used. These powders contain mainly oxalic acid which, through the rise in temperature caused by the rubbing between the acid itself and the marble, creates a chemical reaction that brings marble from the state of calcium carbonate to that of calcium oxalate. This process, once completed, gives the surface a very bright appearance, called the mirror effect. Marble polishing is suitable to eliminate small and medium-intensity stains.
Crystallization is a technique used to polish marble, it is a process that takes place thanks to a chemical reaction.
Unlike the polishing that penetrates the material and becomes an integral part of the stone, the crystallization acts on the surface leaving a compact patina of calcium oxalate.
This technique is suitable for eliminating marks and halos of small and medium size, mainly caused by acid substances.
Smoothing, unlike marble polishing, is a process that removes the superficial and damaged layer of a flooring, in order to bring the marble back to its original condition.
This process is carried out using sanding machines and being more intense than polishing, it is recommended to remove rough and deep corrosion marks that invade the entire surface.
It is not certain however that one process excludes the other, recovery interventions on very damaged marble floors in fact, may require all three processes.
This is how it happened during the restoration work on a typical post-war marble floor, where the talented artisans of the Pippolo company – L’Arte del Trattamento performed all three processes; let’s discover the interesting passages.
Restoration and polishing of a marble floor
Step 1 – Sanding on marble floor
As a first step to smooth the surface, they used the new DISC PRELUX with wet FLOOR SCRUBBER.
In this phase, thanks to the intensity of the disc, the surface layer is removed; specifically micro-corrosions and micro-scratches are removed and the surface is prepared for crystallization.
Once smooth, undamaged and uniform, the flooring is ready for crystallization.
Phase 2 – Marble crystallization
To carry out the crystallization of the marble, the specific KW STAR product was spread and worked with the help of a wet FLOOR SCRUBBER on the entire surface. KW STAR is a powder containing micro-abrasives for polishing all types of marble, even hard and with impurities .
The polishing takes place progressively during the mechanical rubbing action.
Once the work is finished, the original beauty and shine of the stone is visible to the naked eye.