The value inside the parentheses is directly from 3m 3m chart messages in this thread rottenstone.
Green scotch brite pad grit.
3m scotch brite nylon pads.
7445 white pad called light duty cleansing 1000 1200 1500 grit 7448 light grey called ultra fine hand 600 800 800 grit.
In our auto paint shop we use maroon for rough keying and the grey scotch bright for a more refined finish i generally finish with a 800 grit on the belt grinder then work with various grits of wet and dry upto 2500grit used with alight penertrating oil then a final polish with the grey scotch bright and penertrating oil then a light polish with an automotive paint cutting polish if i want.
7440 tan pad called heavy duty hand pad 120 150 60 green scotch brite is available everywhere.
7446 dark grey pad called blending pad 150 grit cami 7440 tan pad called heavy duty hand pad 60 grit cami blue pad sponge combo scotch brite is considered to be about 1000 grit cami 2000 grit fepa.
Blue scotch brite is considered to be about 1000 grit.
6448 green called light duty hand pad 600 600 grit.
3m scotch brite nylon pads.
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.