Q. What chemical can I sterilize my cutting bench with?
We're not exactly sure what you mean by a sand cutting bench, but we think you mean a cutting bench in which sand is the medium which you use to make the cuttings. From what we have been able to find by doing some research, it seems that steam sterilization is the most effective way to sterilize the sand in your cutting bench. We have found information on the temperature that it is necessary to maintain for about 30 minutes. However, it isn't clear to us as to how this is done on a small scale, which we assume is your situation. Here is a link which will provide information on steam sterilization, which may give you some insights on how to manage your situation:
Good luck with this.