Chainsaw Repair

I would put new rings. It's down and their cheap = Caber. Now OEM ones close to cost of a piston kit. 
Check skirts for wear? Shiney looking at bottoms and thickness.

Meteor piston kits about 35 and just rings about 10

IMO if cylinder has no scoring or transfer you dont need to do anything.  I dont use the acid method either. 

Maybe rough up with scotchbrite pad and flush when done.   

I use a 1 2 3 method on bad cylinders.  Flapper for removal of transfer, emery clothe by hand to finish checking areas, ball hone to to deglaze and crosshatch.   Really not needed but like what I have seen for my uses.

Thread on ball hones. They have the sizes on them. Say 47-51 etc. http://chainsawrepair.createaforum.com/stickys-of-how-to-basics/honing-ball-hone-etc/