They do sell baking soda blasting material. It will not last as long as other types of media in blasting cabinets but it works pretty well. I have used boxes from the supermarket in a hand held blaster for small parts. When done blasting, you can rinse with water and it will dissolve the left over media. No worries of media being left in there to score anything up. You will have to blow of parts off with compressed air and use a blow dryer with warm air to completely dry the parts so they don’t surface rust before clear coating or paint.
