If you use the diamond wheels, specially on the Haus, you aren't going to keep in on any one grit for more than about 3-5 minutes. Those diamond wheels can take the ball down fast. The Cooke Machine diamond pads took a little longer, but not much.
After I got my Cooke Machine, I only used the Haus for the diamond wheels. Takes the flat spots out like no other. Then moved the ball over to the Cooke for the 320, 400, 600, etc.... I personally liked scotch brite on the machines, not as precise, but cheaper and easier to get.
Nor Cal, start to finish, you should be able to do a complete resurface in 10 minutes, 15 if the ball is terrible or urethane. Biggest factors are how bad the ball is to begin with, do you use diamond wheels, and how fresh are your sanding pads/scotch brite?
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