There are tools for putting a spiral in the guides that do help with the lubing of the valve stems--

If the guides are worn too much, knurling won't bring them back to an acceptable condition, even with the tools that roll the thread shape vs the type that sorta taps it. Valve guide condition, clearance, type of seal and oil used can either prolong the life of the job or severely shorten it. I have repaired hundreds of heads that had knurled valve guides, especially in the middle to late sixties and then of course into the unleaded fuel 1970s.