Good safety advise on the gear. Keep anything you do not want cut off away from the grinder. They are capable of going right through fingers. Ear plugs for noise and to keep sparks from getting into your ear drum. I wear ear plugs when welding for the same reason. Some more good advise when cutting grinding torching is give yourself a good amount of time to work on something else or clean up for an hour or so. Give yourself some time to make certain that your garage will not burn down.
You really want to do some cutting get a 6" metabo slicer