A hone is for putting a finish on the bore, not "sanding off" transferred aluminum. There is only so much thickness to the NiSi coating on the cylinder wall. Using a hone will only serve to wear that down unevenly and excessively. Also, there's a risk of beating through the NiSi on the port edges. You want to sand directly on the aluminum that is transferred onto the cylinder wall. This is best done by hand. You can also get muratic acid from the hardware store and use a qtip to apply it to the aluminum. It will bubble and turn green. It helps to heat the cylinder first as it makes the acid work more quickly. You want to make sure there are no pits or scratches through the NiSi though, or you'll eat the aluminum behind the NiSi.
