Obviously the front rotors will now either have to be replaced or machined(would recommend replacing)...but the root of the problem may also be a collapsed brake line. The flexible lines do have a steel inner that can collapse withe age, causing the piston to stick. Once this starts it usually progresses and can cuse damage to the caliper as well. This can also be a huge safety issue! I would replace them and spend a little extra to go with the stainless steel. They will last longer and give you a much firmer pedal...just another avenue to consider.