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Author Topic:   Rust Stains on Rails
mrdrago posted 09-04-2003 08:24 AM ET (US)   Profile for mrdrago   Send Email to mrdrago  
My 87 Montauk has rust stains at the base of where the rail supports meet the fiberglass. At least I think they are rust due to the brownish color. I'm surious if anyone else has seen this type of discoloration. There might be some type of gasket that has deteriorate, but not sure. The fittings themselves do not appear to be rusted. Curious if anyone knows how to remove the stains from the fiberglass.



Robob2003 posted 09-04-2003 12:21 PM ET (US)     Profile for Robob2003  Send Email to Robob2003     
I found out about Barkeeper's Friend from others on this site. It's a cleanser with abrasives, so don't get too heavy handed.

Wet the area to be cleaned then sprinkle some cleanser on a wet piece of terry cloth towel and rub the area lightly. Rinse it off and the rust stains should be gone without scratching the fiberglass. It worked great for me and I continue to use it.

It is superb for removing the rust spots from the stainless rails themselves. Follow up with a little CorrosionX spray.

Bob on Tampa Bay

lhg posted 09-04-2003 02:56 PM ET (US)     Profile for lhg    
I have the same problem with the bow rail bases on my 1989 Outrage. Whaler's supplier at the time evidently did not use a high grade SS for these rails.

What you have to do, on an "as needed" basis, to really clean up the problem, is remove the rail and polish the bottom of the SS rail bases to remove the surface rusting. The boat gelcoat can then be wet sanded to remove the rust stains, and re-polished, then re-install the rail. As for the wet sanding, first try #2000 grit. Only go courser (to #1500) if that doesn't work. Use Meguiar's #44 after the sanding, then Finess-it II on the gelcoat. If you have any stripped out screws holding the rail bases, this is the time (before wet sanding) to drill them out to 1/2", and pack in white Marine-Tex, then re-drill. This will be a permanent fix for that problem.

mrdrago posted 09-04-2003 07:02 PM ET (US)     Profile for mrdrago  Send Email to mrdrago     
Thanks guys, this is very useful information. I'll give it a try, but probably this winter after the boating season is over.


rsgwynn1 posted 09-06-2003 11:35 PM ET (US)     Profile for rsgwynn1  Send Email to rsgwynn1     
Go to the website for Woody Wax.

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