It's hit or miss imo. I had to change the surface serveral times before I was satisfied with the reaction. Frustrated, my last attempt was at 800 with a burgundy scotchbrite pad. Then proceed to have the best 3 weeks in 4 different centers 300/806, 300, 835, 804. I have one now drilled with a motionhole thats at 500 abralon with factory polish and loving the reaction. Have patience as the Evolution XT cover and Impact core is a funny combination. Good luck