OP

Quoted from nerdygrrl:

Metal ball guides make up a good bulk of the bolted topside bits. As we are all aware of these guides end up will ball streaks, mushroomed, and even gouged. Therefore it's imperative that we give them a good look over before re-installing as we don't want nicked balls.
While looking over my guides I found a particularly nasty little fellow whose wear went well beyond a ball line to full on gouged. I was about to post a WTB or Anyone Make Repros thread, but decided to give a Dremel with a grinding attachment a try. Sadly I did not have a grinding wheel attachment, which I am sure would have given better results, but I am happy with how it worked out.
Essentially I hit it with the stone attachment, then sanded with 120, then 220, then a "green scrubbie" attachment, then a little metal polish.
I know others mention waxing these guides and that is something I am on the fence about, but will give this guy a couple of coats for added protection.

OP

Quoted from nerdygrrl:

I was wondering the same thing about the grinder and have also been thinking ahead to that flipper/guide situation too. I know that will definitely need to be addressed. After doing this swap I understand why so many rubbers break on this machine. There were so many guides that were off the mark. It's like when they did the math, they did it w/o taking the rubbers into consideration.