What grit stone for honing used liner?

[Kevin Trent <trentkc@domain.elided>]

This is a follow up to a message sent last week.   I've decided to purchase 
a ball-type "flex-hone".  What grit should I purchase: 120, 180, 240 or 
320?  I thought the common hone for preparing cylinders for new rings was 
240.  Since my liners are used and have some wear, should I use a 320 to 
minimize taking additional material off?

I'm using stock Borgo rings.  Would honing grit make a difference in if I 
was using Hastings or Deves rings?  Are there general recommendations for a 
particular grit for different ring materials?

Thanks,  //kct
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