cleaning black marks of a 172 barrel/

hey recently got a 172 barrel for a friends sr 172 project but it has 4 or 5 black lines down it, some of them u can feel a slight score i mean very slight but can they be sanded down? i know it wont be like a brand new barrel but would it be usable wiht a brand new piston and rings? how and what would i smooth it down with? thanks

 

And heres me thinking malossi 172 cylinders were nikasil plated, so couldnt be rebored over size
without being re plated

also are there actually any over sized piston sets for 172 kits ?

 

yeah so you recon he should bin it then?

it still runs well when fitted to the bike though minor cratch:

 

rag it till it goes ,,,

 

all i asked was how to clean it and what with, not reboring it,not buying a new one, not ragging it till it blows up, not throwing it at my neibours just how to rub out the marks :wallbash:
anyways ive been told
400 wet and dry and wet it
and rob it in a curcle not up and down like the piston goes so gona try that

 

so y did u ask

 

look what i asked, u said rag it, woow that was helpful!

 

yer and u answed your qustion ,if it was me i buy a brand new one