Neglecting the stainless on your boat will allow it to become rusty and ugly. Fortunately, it is relatively easy to deal with if you use the right product.
I bought this product at a boat show a couple of years ago.
The instructions say that you just brush it on, let it stand for 30 minutes and hose it off. I tried that, it didn't work well. However, when I used a green scotch bright pad, the stains came off very easily.
This pic shows a winch with the product applied by brush.
A scotch bright pad will easily remove the rust after the product has been on the stainless for just a few minutes.
Although the instructions say to leave the product on the stainless for 30 minutes then wash it off, I used a scotch bright pad after only a few minutes. The stains came right off the smooth part of the winch. The drum has a textured surface. I will need to find a suitable tool to get into the rough area of the drum.
The winch cleaned up well and easily, except for the textured area on the drum which I will work on next.
The product worked great on other stainless steel items as well.