So here's what I did. I opened 2 eggs, peeled off the shell, and let it dry for 2 days. Than I mill it with a coffee miller, than I use a sieve to separate the bigger pcs from the "dust", and I received really tiny grains that can be used to simulate anti slip compound.
I sprayed some tamiya primer on the model, and when it's still wet put some grains on it, dust off the excess and put on another coat of primer. If the texture is too rough you can sand some off, do some motion movement with the finger, or brush it with an old sturdy brush.
Here's the result:


