The original way to step through the grits was to never go more than double what the previous grit was.
You typically started with (these grit numbers are in US Ansi/Cami grits) 220 then went to 400-600-1200 then compound/polish if you were wanting the high shine.
Usually you only started with 100 grit if the ball was really bad or you had cut down plugs.
If you wanted to save as much original coverstock as you could, back then you would first patch the biggest nicks and gouges (with superglue or a drop of clear plug if you had it.). Then coarse sand till most of the nicks, gouges were real small but not all the way out. You would then start stepping through the grits and the nicks would slowly disappear until you had a very smooth blemish free ball and give you a very smooth surface ( depending on what surface you want of course.)
The reason for stepping through the grits that way, was so the final grit was as close to that final grit as it could be.
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