Hello good mornig for everyone. I need to cut a thick layer of rubber from a rack that is for a keyboard that doesn't close me because the previous owner had a lower keyboard. I wanted to know if you can help me to know how to do it in the most practical way. I tried a cutter but the sheet is folded quite a bit. Should I buy a thicker one? The gum is whole, that is to say it does not have a piece stuck, it should be eaten thanks attached photo IMG_20190920_121642024.jpg [4.11MB] IMG_20190920_121656718_HDR.jpg [3.15mb]

You may have to do it with several passes. Use a ruler so that the cut is not run.