although it may be legal, it sounds like very bad airmanship to do such a thing and very dangerous. I think it would be very foolish to fly in IMC with no radar cover.
This chesnut comes up with boring regularity. Just have a look at the number of aircraft which have collided in the open FIR/Class G when in cloud in the last 50 years (= 0, to save you the trouble) compared to the number in VMC, or the number in controlled airspace and you will realise that IMC in uncontrolled airspace is the only safe place to be.
So, can I be excused from being foolish and dangerous please
W