polished internals pretty much eases up on the wear of your front and rear bolt...when its done properly, basicly smoothes everything out alot more than what they come stock.
what i did was used steel wool the first time, i dont think i'd recommend that though cause it took me like a week to get everything done that way and it wasnt even done that good.
my neighbor, who is a hobbiest told me to get some wet/dry sandpaper or emory cloth, it did that and i just got a pack of 3 grits 50/80/150 and it worked excellent.
its on the model98.net website under the mods section, its a great website for peeps with 98's.
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