Radeen here......
I have been using Spotless Stainless for many years. This product is THE BEST for cleaning rust off any stainless material. Here is how I use it...
#1 Do this at a dock with plenty of water and good water pressure availabIe for hosing off. Best on a cloudy day over 70.
#2 Shake well, then pour a small amount into a cup wide enough for a 1" or 2" foam brush
#3 Apply Spotless Stainless to metal in a thin layer. It will not hurt teak or gel coat or other surfaces.
#3 Spotless Stainless is the consistency of a light milkshake, so it will cling to vertical surfaces.
#4 Wait 30 minutes. If the product dries out in the especially rusty areas, moisten it with more.
#5 Rinse vigorously and completely. No rubbing needed.
#6 If any rust remains, I use Collonite Metal Wax #850.
#7 Ideally, wax all cleaned surfaces as soon as possible to prevent new rust from forming. I use Collonite Wax #925......
RADEEN....IP35 Island Spirit
Here is a picture of the product, order off Amazon or your favorite store: