polishing can be done at home if you have the right equipment,i did this all at home with a bench polisher which runs at 1400 rpm, i used three stage polishing,1st stage,rough mop and polish to remove scratches chips etc then second stage,medium mop and polish to remove all surface scratches caused by first stage,then 3rd stage fine mop and polish i prefer to use a slower mop as the faster mops can easily remove engravings,stamps etc