This may work on some aluminum dust cap, don't try it on one made from paper! Also, you have to know how strong/ fast you can pull or you may bend the voice coil. A typical case of looks easy on the internet, but...
It appears you did not read this thread. Sonus Faber uses a decorative grill that is basically strings. It looks great, Sonus Faber makes absolute pieces of art for speakers, but they don't use grills that PROTECT the drivers. But this was all already stated when the first person suggested putting the grills on.