Render Gun 

This piece of equipment will allow you to apply lime renders efficiently and quickly. Mechanical spray application using these renderguns can allow you to spray on up to 25-30 square metres of render per hour. These machines are perfect for applying base coats, floating and finishing coats, giving a consistent and even application to various backgrounds. Renderguns can be used in conjunction with a wide range of our materials, allowing you to apply renders with varying aggregate sizes, mix ratios and colour with ease.

The render gun will require a single tool compressor to operate it effectively.

Please see link below:
http://www.acf-france.com/index.php?option=com_content&view=article&id=49&Itemid=113&lang=en