Sharp coping bricks = ouch!!

[CallMeIshmael]

You may also want to look into granite/marble installers (the folks who put the bullnose edge on the countertops). Most of that work is done in-shop, but the installers have diamond tipped bits & tools (similar to router bits but larger) that could do the job on site.
Good luck.

[y0manda]

yeah i would round it off with a diamond blade and a angle grinder. thats one of the reasons why I didnt want to have real rock i.e. flagstone or what not installed as a coping. good luck

[imfignewton]

Use a wet diamond polisher like the ones used for polishing pool plaster. This would be the same type of polisher that is used for counter tops as mentioned above. Some stone masons have dry polishing pads for 4" angle grinders. Natural stone can be installed as a pool coping then the sharp edges rounded slightly so they are not sharp, the look of stone without the suit catchers.