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I think the paint covering is WallShield, but I am assuming that the render effect is not part of the paint.
The particle size is less than 5mm and sharp edged, so I am assuming that it is some king of grit.
Difficult to find a classification - Google suggests that sub-4mm maximum size is classed as fine aggregate.
Googling for Tyrolean suggests that it is just sand and cement clumping up and the particle size sounds about right.
However, the description of the problems using a Tyrolean gun are a bit off putting and also blending patches into a wall already finished and over painted sounds a long and tricky process.
So, is there an alternative to using a manual gun to apply a rough finish?
Cheers
Dave R