I have a small 8"x3" area under my rear door that rust is taking over the paint. it is kind of bubbly. I would like to repair this. What would be the best route? I have some rust remover. Should I apply that, let it do it's thing, clean it up, then maybe sand the area with steel wool and use touch up paint? I have some rubbing compound and some polish as well. should i apply those after the touch up paint? or maybe just the polish? or is there a better method? i'm a detailing noob.