so i was wondering if there are any ways in which a daemonhost could hide himself amongst the normal population. are there any psychic powers in which help them hide against detection from psyniscience or other detection methods?

Biomancy-Power Shape Flesh. he should be able to keep it up 24/7, so looking just like a normal person is a huge help.

thank you for replying, but i was looking more for a way to hide psychically. the daemonhost looks like a regular human, but all it takes is a psyniscience test and their cover is blown. is there a psychic or sorcery power that can hide their psychic imprint or mask it to be regular? what does a regular psychic imprint look like anyways and how is a daemonhosts different? when someone views it do they automatically know your a daemonhost or do you just seem different (the psyniscience test just says you know or not)?

In the end it is for you as the GM to decide. If it is important for the plot to remain hidden, then let it be a Very Hard (-30) Psyniscience test to recognize if at all. You can explain it in any pseudo-occult way you want that sounds fitting with the theme, if an explanation is needed at all (not that the PCs will ever find out). Daemons tend to be very diverse as are their powers and weaknesses. The daemonic familiar of this principal from the Brotherhood of the Horned Darkness (forgot his name...Zentos something...)) featured in DotDG has some sort of power that makes it very difficult for anyone to detect it being a psyker or even a daemon. One can only smell slight burnings in her proximity...

this is immensely helpful. thank you.

Daemons and possessed humans have a Mask of Seeming which imposes a -30 penalty on all psychic methods to detect him. Says so in the DH core rulebook. Crude but effective

I do think that there should be little odd things to reveal a sharp-eyed observer that something is amiss. Like the stench of burning hair, strange half-heard whispers, water running in an unnatural manner ... after all, the Warp walks bound in flesh and would surely disrupt reality.

SPOILER FOR DAMNED CITIES AHEAD!!

If you already own the "Damned Cities" Modul, are means of hiding like that is used in their as well as the corpse-minions are smuggled into the clockwork court. While it is not discussed how this spell was achieved, it results are after all what your are searching for

As it was already said: If you need it done, use Magic & a GM FIAT