I haven't came across any methods or techniques laid out by the Venerable Master for becoming incognito, so to speak, in the astral. When one is out in public and the astral body slips out, what is a method for becoming invisible and protected in the astral from invading entities?

The Golden Dawn adherents have a technique entitled, "Rose Cross Ritual," but should only be used by adepts of that tradition, for this purpose.
I have had a lot of trouble with concealing my astral body in the general public rendering me susceptible to phantasmagoria and many a snares.

Thank you
and I will pray for you.