CLR to flush radiator?

[HuskyMan]

time to change the antifreeze, been reading these two threads:

http://www.merkurencyclopedia.com/Cooling_System/cooling_sys_clean.html

and....

http://www.gadgetjq.com/coolant_replacement.htm

question: has anyone used the CLR with hot boiling water to flush a radiator? if so, did you first remove the radiator as the poster states and slosh the solution around, then drain? thanks for any input, I had never
heard of anyone using CLR before but it sounds like a viable idea......