NAPA Brightener and stainless steel?

[mgarvie]

I own a laundromat and while reading a forum for the laundry business someone mentioned they use NAPA Aluminum Brightener on their stainless steel machines. It always worked great on my pontoon logs but on stainless steel? Anyone here ever tried it on stainless steel props, coolers, etc?

[teecro]

I've read from the manf that it will brighten SS safely too...

I want to try it on my SS prop as it has a weird dull gray finish now (almost like a coating) after I left it in the water for 5 weeks. But I only haul out once a year if at all possible...