Removing rust from stainless

Quickstep192

Anarchist
603
102
Chesapeake
I’m looking at a 10 year old J Boat. Overall, the boat looks to be in pretty good condition, but much of the stainless stanchions have rust spots on them down toward the base. It looks as if there’s impurities in the stainless steel leaching out. Is there a way to remove or polish this out without replacing the stanchions?

As always, any sage advice is greatly appreciated. 

 

El Borracho

Sam’s friend
6,239
2,327
Pacific Rim
If you can remove the lifelines and stanchions from the boat there is nothing quite like polishing with compound and a wheel. Far better, shinier and longer lasting than the hand methods done in-place. It will not be impurities in the steel. Scratches and small pits can be ground out with a flapper wheel. Larger defects are easily welded up to be undetectable. Bends more that very slight are the only thing which cannot be repaired.

After any polishing the surface should be passivated. The easy way is to wash well in fresh water and store in a warm, damp but NOT SALTY place for a week. The harder way is 25% strong nitric acid for a few hours. I heard soaking in hydrogen peroxide (from hair dressers) works too. Fancy welding or metal shops might do all this work.

 

ScowVegas

Reporters
4,417
7
Chicago
For chromed parts, believe it or not WD-40 and aluminum foil is the shockingly effective - spray part with the WD-40 and rub with aluminum foil - try it and thank me later :)

 

jamhass

Anarchist
770
125
Once the heavy rust is removed, coat with Collonite Metal Wax.  Really great stuff, and removes light rust very nicely without damaging the passivated layer.  Their insulator wax is particularly effective at keeping rust away, especially when used after metal wax.

 

SloopJonB

Super Anarchist
65,115
10,607
Great Wet North
Big talk. BF can do anything, it is the king. What is this product of which you speak?
image.jpeg We've used both - this is better.

It's made by Lagostina to keep their S/S & copper pots & pans looking pretty.

 
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SloopJonB

Super Anarchist
65,115
10,607
Great Wet North
Nevr-Dull is a waste of time IME.

Doesn't even do a decent job on household copper & silver and that's a hell of a lot less challenging than marine S/S.

 

Ishmael

≈≈≈≈≈≈≈≈≈≈≈≈
48,170
9,441
Fuctifino
I like Flitz, the 3M Marine Metal polish, and Wenol, which I found in a bag of stuff I inherited from someone somewhere.

Flitz also works well as an acrylic polish, surprisingly.

Wadded newspaper and spit is better than Nevr-Dull.

 
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