The first thing to do was to sand the entire area to smooth the surface. For that, we rented a big sanding machine.
|Heavy duty sanding machine|
Once all sharpness was gone Pekka continued to remove all smudges of concrete and other dirt. For that, a smaller sanding machines were perfect. However, it quite quickly become evident that a very humble attitude and hours of manual labor down one's knees was required to clean the stones completely, irrespective of the machinery he was using.
|Focus on the details|
After cleaning the slates one by one Pekka proceeded in the washing phase. Still some pretty extensive rubbing was needed to get the area completely clean.
|Manual junk removal|
But when cleaned and washed, it was evident that Pekka's careful work was certainly worth every minute and effort invested in this project. It would look great.
|Sanded and washed|
|Dry and ready for the final coat|
Pekka used the same protective coating (Lantania Avo) than for the floor inside. It turns the tone of a slate slightly darker vs. the original, but does not result in a "wet-look". Also, Avo seems to have a bonus effect: it hides away tiny little grains of dirt from the stone surface (something which seems to be characteristic to this type of slate) resulting in visually more homogenous look.
|Applying protective coating|
A few more hours of kneeling and rubbing, and the final slates had received a protective coating. And the end result - almost too good to be true. And almost unrealistic, that it is finally ready. Patience and persistence truly do pay off.
|Smooth and shiny terrace surface|
Patience and persistence. Yes, I know all about that, says Urho. Two fundamental elements of begging. Just look at this face - how could you resist?