An easy, cheap and great stainless steel appliance (i.e. sinks, stove tops, rangehoods etc) and I guess other things too polish is simple glass cleaner (like windex etc).
Simply spray it on and then buff/ wipe off with a clean cloth (you may need to rub a little for tough marks, then simply rinse if you wish and buff again (if you wish to rid yourself of the smell or any residue chemicals), my sink came up looking like new …
Sharon