Radiator Flush

Ok i think my radiator is plugged somewhere, even though when i put the hose in it and te water came out the bottom hose fine. After the car was overheated i killed the car and felt the radiator. around the ac fan it was hot, but around the radiator fan part it was cool. I know the radiator fan was on but it was a biiiig diffrence in temparature.
Ok my question, someone told me that muratic acid is ok to flush the radiator with because it dosnt harm them. I dnt know.