If fitted, the turn needle will always indicate the direction of spin. Drill goes something like:
Check height (if parachute equipped), throttle closed, ailerons neutral, check turn needle and apply full opposite rudder. When needle comes off the stop centralise rudder and move stick forwards (or backwards if inverted) and recover from ensuing dive.
Altimeter, VSI (with lag), ASI and turn needle will work, not sure about turn coordinator as it may give duff gen when inverted.
Never tried myself and above is from (less than perfect) memory so others will know more.