I use a canvas-resin...a little different than the standard phenolic. My personal cue is over a year old and gets used everyday...the grooves are still there. I see cues I've made several years ago...they still have the groves. Its my opinion that if you leave the tip alone & just break with it...the grooves will last. Unless you try & shape it or sand it. Occasionally I'll see one of my cues without the grooves...but each time it was because the owner had indeed been shaping/sanding/grinding on it somehow. Like you said, its not steel...so I'm sure over a period of time they may where down...I just haven't seen it yet. So if you leave it alone, play every day...the grooves will last indefinately. Of course as you can tell by the pic, I cut the grooves somewhat deep...you can not get the same effect with sandpaper. I give a lifetime warranty on my j/b tips & tip/ferrule combos...and I'll also clean the tip up, polish the ferrule, and recut grooves if needed, free of charge, for any of my customers with Varney j/b cues.NaturalEnglish said:Those grooves do look pretty interesting. But I would imagine they will wear down and the tip will get smoother as times goes on. Phenolic is hard...but its not steel. What has been your experience with the life of those grooves? The tip radius looks pretty close to my tip radius of about a quarter.