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Old 11-30-2020, 3:14pm   #16
JetMechZ16
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Just an FYI I heard on one of the car shows. When blasting with soda it changes the PH of the metal and paint won't stick to it unless an additional step is taken to correct that.

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The main question to ask - is a coating going to be re-applied? If so, some sort of neutralizing and cleaning of the surface needs to be done. Baking soda (sodium bicarbonate) has a higher than neutral pH and contains some degree of salt (chlorides). You must have a clean, oil free and pH neutral surface to ensure that you won't have a coatings failure after any type of media blasting. Coating failures after soda blasting can usually be traced back to no pre-paint preparation, poor preparation or incorrect preparation. Baking soda is a wonderful media that allows you to do things that no other media will accomplish, but you need to educate yourself about the media and follow a few simple steps after blasting.
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