I think all you need to really know is don't take off ANY more material than you need, and as noted pull it towards you and move around. You don't want to apply too much pressure, and don't try to cut too much at once.

Have you measured what your piston to wall clearance is going to be with the forged pistons? Stock PTW was supposed to be .0025-.0035. If you're running TRWs they can require about .007 anyway, if you think you're worn about .004 it might make sense to get a hone from a shop for $100 or so, you might be straight and square at .007.