I am replacing my front bumper cover and am trying to get the fog lights removed. I noticed that half of the threads and nuts are virtually rust free and the others are horribly rusted. It looks like someone replaced three of the threads and nuts. I have already broken one of the rusty ones and was wondering if anyone might know how they did this? I checked on Lexus Parts and they only sell the nut, not the threads. Check out the pictures and let me know your thoughts. Thanks