I bought the machine JFJ EASY PRO to repair scratched CDs to be ripped, it works OK and it is well designed (just a motor + abrasive rotating disc), but the abrasive paste sold at this completely crazy prices deserves some comment . We must not exaggerate and take people for i .... There are excellent pro abrasive pastes between 20 and 30 euros per liter (not the tube 12 Oz (fluid ounces) or 36 cl) that allow to obtain flawless finishs on all surfaces and CD is finally only polycarbonate wafer covered dune fine daluminium layer (on its upper face opposite to the face to be ground in case of stripe!). So good, it's not because we love the music we will pay the price of 5 CD vulgar abrasive snacking! Child I was inclusions of all kinds of objects in blocks of polymerized resin and finish perfectly "mirror" was obtained with this type of dough ... (but not at this price) and oil ... elbow ...