A hone is simply to break the glaze on the walls to seat new rings. If there was any real problem with the engine then I agree it should be overbored and honed by a machine shop. If you just want to refresh the engine there is nothing wrong with honing yourself if the walls are straight. I used to refresh the engines from our BMW road race car each season. I measured the bore taper with my dial bore gauge and then ordered new rings and honed them myself. Worked perfect every time.