Hi, I kinda need help from the sifus here. So I tried using a filer to sand off the nubs but after finishing it with 1000 grit and 1500 grit sandpaper, I still couldn't make it as shiny as it was. Here are some samples:


Any ideas on how to remove those scratches? I heard you can use a polishing agent but I don't know whether a car polish is considered one