I found a thread in performance but it's preety inactive so any one know how to polish their tunnel? how long it takes and how often you have to do it?? Just any thing about it would be great!!
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Jewlers Rouge and a buffing wheel on a grinder. Start with red rouge follow up with white, 3rd step use a liquid such as mothers. Once you have done this you will probably never have to do it completely again. Just use some of the mothers and touch it up once in a while. This is the fastest method and gives the best shine but still be prepared to put in some time, especially the first time you do one. Its best to be able to do it outdoors too as you will get aluminum dust on everything! Good luck.