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Antique Tractor Paint and Bodywork

Rust remover

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herald

07-01-2007 06:27:29




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Has anyone ever used a product called "The must for rust"? I used it on a rusty motor block and it worked fine, left a film on that hasn't rusted again. Now I wonder if paint will stick.. Not much for directions, "spray on let soak awhile , then power wash off". Made by Krud Kutter in Cumming, Ga. Did I mess up using it on something to be painted? Thanks, Harold




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CNKS

07-01-2007 16:48:14




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 Re: Rust remover in reply to herald, 07-01-2007 06:27:29  
You are going to have more problems with oil and grease on the block than the phosphoric acid. The procedure I use (BUT, see comments at the end of my post) is to clean the block thoroughly by pressure washing followed by multiple applications of wax and grease remover. Follow with Must for Rust. Before you paint remove all the film you can with a scotchbrite pad, then use more wax and grease remover -- it will be dirtier than the first time. But, although I have done it with no ill effects, cast is pourous and the possibility exists that the residual acid in the pores will lift the paint. I don't use it any more on cast. I do not have access to a hot water pressure washer or steam cleaner, and couldn't use it inside my building anyway. If you do you might be able to prepare the block for painting by pressure washing and painting as soon as you have it dry -- you will get flash rust immediately, though. I live in a dry climate, work inside and leave bare metal for months without rust forming. Not everyone can do that.

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CNKS

07-01-2007 16:53:43




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 Re: Rust remover in reply to CNKS, 07-01-2007 16:48:14  
I might add that I do not use it as a rust converter as you did -- I do not trust rust converters, and remove rust manually, any Picklex or Must for Rust I use is used as a rust preventative, not a converter. Converters should be used only on parts that are next to impossible to get clean. Only my opinion.



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