Some people have a confusion, that is sometimes the musical instrument will have the dents when the it use for long time or run into something hard. Maybe it will affect the working of the instrument. How to recover the dents as before?
Using the neodymium magnet, this is inserted by a magnetic ball into the musical instrument which similar to the size where the the dents located in. And then you need to put a large neodymium magnet on outside to control the magnetic ball and work it with dents. Once in same place, the ball will rolled back until the dents work out.
Do you understand it? Please feel free contact me if you have any further questions, AIM Magnet Co.,Ltd welcome you anytime.