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Antique Tractor Paint and Bodywork

sand blast

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n2rudr

05-17-2006 20:05:06

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I have heard of using baking soda instead of sand to blast clean parts for painting, has anyone tried this and where to purchase the baking soda. Richard

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Jim in OH

05-20-2006 21:27:18

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Re: sand blast in reply to n2rudr, 05-17-2006 20:05:06

Richard, some things about soda... 1- abrasive enough to remove paint, but won't harm the metal or other materials.. even plastic, if you are careful
2-won't harm bearings (crushes and/or dissolves)
3-not abrasive enough to remove most rust
4-it is nearly once through media... its cutting properties are gone very quickly
5-Need pressure pot to get it going fast enough
6-Needs special equipment (on the pressure pot) to get efficiency reasonable. 8-Expensive to buy equipment and soda

Where soda really shines is in paint, stain removal from delicate items.. like thin metal, soft metal, fiberglass (like corvette bodies), artifacts, etc. The worst problem on old tractors, is number 3.

My info comes from daily sagas of a collegue at work who does sandblasting of car parts and tractors and has just now started working with soda.. (started with a $500 pot and now investing $35,000) A little rich for my blood....

Jim in OH

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n2rudr

05-20-2006 21:39:20

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Re: sand blast in reply to Jim in OH, 05-20-2006 21:27:18

thanks for all the input Richard

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1030 brian

05-18-2006 19:25:17

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Re: sand blast in reply to n2rudr, 05-17-2006 20:05:06

Hi! If you can, try to avoid using sand as an abrasive. It usually contains silica dust that is very harmful to breathe, even with a respirator. Use the Black Beauty, no real health hazards and it "cuts" alot faster. Good Luck! Brian

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Rod (NH)

05-17-2006 20:41:28

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Re: sand blast in reply to n2rudr, 05-17-2006 20:05:06

Hi Richard,

I've never tried it but the media (special baking soda) seems pretty expensive unless you are going to be re-using it in a blast cabinet environment. I also don't know how it would work, if at all, in standard blasting equipment. As an alternative you might want to consider the extra fine version of Black Beauty blast grit. I've used that to blast oxidation off an aluminum casting (engine valve cover) without causing noticeable profiling. The extra fine is more of a powder than a grit like the standard version.

Rod

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