A1 is easy to spray. This makes it possible to apply a thin layer of A1. This technique is ideally suited for working with a (silicone) mould, but also for applying A1 on, for example, a form made of EPS (Expanded Polystyrene).
For the cup-gun a minimum nozzle size of 1,5 mm is required. You will get a good result with 2,5 or 3 mm. Even a 3,5 mm can be used. We suggest to sift the A1 before spraying to remove lumps.
With a hopper gun the nozzle size can be bigger. Depends a little on the desired surface quality. Most hopper guns have a nozzle size of 4 – 6 mm. For large quantities it is also possible to use a big spraying machine with chopped fibres.