HI Bill Hughes, Yes we have used the pipe heating tape to warm our honey.
 You have to put a little c-clamp on the thermostat to make it go "on"
otherwise you have to wait for cold weather.  This will also make the tape
keep heating so watch the temperature of the honey carefully or it will get
too hot.  But it is a really inexpensive alternative for a temporary problem.
Good luck. Conni and Clifford Still, Bayport, Long Island 16 years-3 hives.