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The Shop => Finishing => Topic started by: RichardDepetris on November 27, 2016, 09:34:39 AM

Title: Best way to polish mildly pitted carbon steel?
Post by: RichardDepetris on November 27, 2016, 09:34:39 AM
I just finished derusting some plane irons. Many have a dull dark gray appearance and some mild pitting.  I have quite of bit of them to do.  On other parts, I would sand them down and then move up the grit to 400-500.  This method, however, removes the pits and the engravings.

I would like to keep the engravings and I don't mind the pitting.  I want to bring the surface to a reasonable shine quickly.  I tried polishing compounds and buffing wheels, but they seem to only turn the dull gray into shiny gray. I tried emery compound and a sisal wheel, but it didn't do much better and the sisal kept tattering up on the edges.

I added some photos of some plane irons FYI.

Any suggestions?(http://uploads.tapatalk-cdn.com/20161127/64f384d220b051a929d33d769b450299.jpeg)(http://uploads.tapatalk-cdn.com/20161127/d20cc108f5e6df6d361889f69bb8fd9f.jpeg)(http://uploads.tapatalk-cdn.com/20161127/4a7b93df3d0932cd760efcc3d41f834c.jpeg)


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Title: Re: Best way to polish mildly pitted carbon steel?
Post by: chipenter on November 27, 2016, 11:04:35 AM
Whire brush on a bench grinder is my first choise or a twsted cup brush on an angle grinder , will put a polish on cast iron and steel the quickest .
Title: Re: Best way to polish mildly pitted carbon steel?
Post by: Biggles on November 27, 2016, 01:28:15 PM
The oxidation seems a little deep to remove with a light abrasive. Even if you use electrolysis it will remove the rust but could leave some pit marks. I think the best you can do is use a soft metal wire wheel then go up in grades with buffing wax. You could just go around the engraving! :coffee:
Title: Re: Best way to polish mildly pitted carbon steel?
Post by: tom osselton on November 27, 2016, 06:45:24 PM
You could etch them a little deeper couldn't you?
A bit of paint on the top and use salt water on the logos?
Title: Re: Best way to polish mildly pitted carbon steel?
Post by: hanermo on November 29, 2016, 11:21:23 AM
Electric rust removal ?

Electric plating, like nickel ?