I opened armrest and started on top to start peeling it off. Sanding the edge for me did not dull it. I only took off the loose sharp area. I've included pics of what I settled on doing with the Sharpie. My Wife and I are the only ones in the vehicle 99% of the time and this will not bother us. I was slow to fill it in and in the cupholder closed pic, you can see the end result. No more sliced fingers unless it lets loose in another area. Sidenote, the material underneath feels like a hard plastic or resin material. It might be tricky to find the right primer and adhesive to glue down correctly. Good luck and let me know what worked for you. Thanks