Hi, I'm trying to change the front rotors for my 97 Accord SE. I've already disassembled the calipers and the caliper holders, but I just can unscrew the front axle nuts. There are dents on both of the nuts, and I think they are there to keep the nuts from unscrewing themselves. Do I need special tool to pound the dents back out? or can I just use a flat head screw driver? I got the 36mm socket already, do I need anything else? Please help!