Hydraluic clutch slave cylinder

[Kevin71]

The slave cylinder started leaking.  Someone else installed it approximately 500 miles ago.  Then it started leaking.  So I have put new o rings in it and was starting to put back together and notice these scratches on the side.  Now I am thinking this could wear on the o rings and cause the leaks.  Should I replace the whole thing.  Hate to have to pull the trans again.
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[Kevin71]

Also  there is a finish on this sleave that the hydralic part rides up and down on.   

[mopardave]

if you noticed that the side of the cylinder is scored/scratched you can try to steel wood it or I would just replace the assembly. IF you go somewhere on the road and have a failure you will kick your self for not replacing it..