u/Ambitious_Oil_7615

So I need some help people, tonight I will attempt to re-chamfer my SKX173. As you can see its completely rounded off and there are no more lines visible. I have too much invested in this dang thing to let it go (new dial, new hands, new bracelet, initial extortionary price of the watch)

Any tips, how to's or recommendations. I was going to use sandpaper taped to a metal block and patience.