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Tool Talk Discussion Forum

Cleaning cast iron table saw top

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Illinois Farmal

08-14-2006 13:12:07




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I have a cast iron table saw that has some rust spots on it from where the mice have been on it. What is the best way to clean it up and keep it from rusting more. Thanks.




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JOHN HARMON

08-14-2006 20:50:34




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
When my Saws get some rust spots on them which doesn't happen often I hit them with my Belt Sander with 80 Grit Belt a little and coat it with clear gloss poly finish in a spray can.All my Saws have Cast Iron Tops and are used every day so Rust is not a big problem. The Poly finish soon wears off so it gets recoated regularly. I Do not use oil finishes at all as I do not want any oil residue on my Wood.Cabinet grade Oak, Walnut or Mahogany are to expensive to take a chance on Oil damage.

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Bernoulli/OR

08-14-2006 20:08:12




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
I use surface conditioning discs - similar to Scotch Brite I guess. They come in hook & loop discs or roloc. I use medium followed by extra fine. Don't use them with WD40 or any other liquid - They'll load up. It takes 10 minutes or so using 7 inch discs on my body grinder to do a saw table. You could use roloc discs with a drill motor. I use paste wax after.



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James in North Carolina

08-14-2006 17:54:58




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
I'll add another vote for Scotch brite. Then I add a layer of Johnsons floor wax.



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Midwest redneck

08-14-2006 14:17:51




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
I got a vertical band saw with a steel table top and I use WD-40 and some sandpaper and it works pretty good at getting out the rusty spots.



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daniel kennedy

08-14-2006 14:02:31




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
sand the top lightly ,clean with paint thinner then put on a coat of butchers wax.
my shop machines stay rust free for a long time
dan



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IH2444

08-14-2006 14:00:07




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
Sandpaper and steel wool. woodworkers supply places sell coatings for your saw table to keep them from rusting. Can't remember any of the names for the products though.



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rustyj14

08-14-2006 13:21:14




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 Re: Cleaning cast iron table saw top in reply to Illinois Farmall, 08-14-2006 13:12:07  
I would think a light sanding with some 80 grit sandpaper, followed by a lighter grade of sand paper, would suffice. Then an application of a light oil, like Wd-40, would keep it from rusting. If you are doing fine saw work, wash off the light oil with mineral spirits, and dry well. then after all is done, re-apply the oil. If the table is pitted badly, then an application of automobile body plastic, sanded smooth, might suffice. you must clean out the rust pits to make it stick well. HTH

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nballen

08-14-2006 15:24:42




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 Re: Cleaning cast iron table saw top in reply to rustyj14, 08-14-2006 13:21:14  
80 grit sounds pretty rough to me!

If you're wanting to use sandpaper, I wouldn't use anything rougher than 320 grit.

Several years ago, I helped clean up a couple of lathes that had been rusted due to a steam leak in storage - the master machinist had us using scotch brite pads, WD-40, and LOTS of elbow grease. They cleaned up pretty nice. Plain steel wool would do a good job as well.

Nathaniel

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VaTom

08-14-2006 16:51:16




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 Re: Cleaning cast iron table saw top in reply to nballen, 08-14-2006 15:24:42  
N, you're right about the grit.

A red scotchbrite pad on an orbital sander (1/4 sheet) with WD40 for lubricant will make short work of rust. Scotchbrites are much better than sandpaper for this job. I buy them by the box from autobody suppliers. Use them for all sorts of things.

Paste wax goes on all my stationary tools. No rust.



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