The green ones are about 600 grit. The blue one is around 1000 grit.
7445 - White pad, called Light Duty Cleansing - (1000) 1200-1500 grit
7448 - Light Grey, called Ultra Fine Hand - (600-800) 800 grit.
6448 - Green (?), called Light Duty Hand Pad - (600) 600 grit
7447 - Maroon pad, called General Purpose Hand - (320-400) 320 grit
6444 - Brown pad, called Extra Duty Hand - (280-320) 240 grit
7446 - Dark Grey pad, called Blending Pad (180-220) 150 grit
7440 - Tan pad, called Heavy Duty Hand Pad - (120-150) 60(?)
Green Scotch Brite is available EVERYWHERE. It's 600 grit.
Blue Scotch-Brite is considered to be about 1000 grit.
(The value inside the parentheses is directly from 3M.)
3M Chart
Less Aggressive --------> More Aggressive
7445 7448 6448 7447 6444 7446 7440
Finer Finish --------> Point Coarser Finish
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To get to 1500 grit, I think sandpaper is the best thing.
Track has a product called Clean and Smooth, that finishes a ball to 1500 grit and less the ball with a matte/dull finish.
You REALLY, REALLY need a spinner to do this work anywhere near well. Without a spinner it takes a LOT of time and a LOT effort, roughly 10-20x the time and effort to do the right job. AND most times you will not do the right job by hand. A good spinner can cost less than the price of one new ball. It pays to order your priorities. What do you really want?
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"Just because you can do something does not mean you should do it."
