I would mirror the earlier advice given, you really do have to know what you are doing in the commercial kitchen sector, you have to be on top of Health & Safety, Hygiene Regs, and of course, proper valid insurance, you would be amazed at what a Fire Investigation Officer can discover!
You are also risking life and limb, as well as property if you get it wrong, like most areas of industrial cleaning, it takes proper risk managemnet, training and expertise, to do the job right and safely, regards,
Rob