With cheaper cast wheels like this, it is a better idea to replace the rim, rather than repairing the wheel. If you do want to repair the heel, heating and hammering the wheel is not the correct way. A better option is to get it cold rolled, even though it it a more costly option, it won't weaken the wheel as heating and hammering would. Even after this, it is still a better option to buy a new rim. I went through someone similar with some old LM reps I had. Most places heat and hammer out the wheel, but only a few shops are capable of doing cold rolling. Contact American Racing for cold rolling repair services.
Jet Black / Gloss Black Grilles / 8000k D1S low beam / 6000k HID fogs / GP Thunder 8500k angels & cornering bulbs / black reflectors / gloss black vinyled window trim / tints / smoked rear turn signals / black roundels / AC Schnitzer roof spoiler / VRS style decklid spoiler / Matte black Stripes / Rear fogs / matte mirrors / 19" LM reps / APR lip