Render Finish Question

[Stoxman]

Hi all, I wonder if one of you can tell me how the render on the photo was achieved. I need to repair some and I seem to remember that the last time it was repaired, some years ago, that the builder had a little device that flung the cement onto the render surface.
http://media.diynot.com/203000_202711_59719_82793034_thumb.jpg

 

[Alastairreid]

Google tyrolean.