Wet abrasive blasting leaves no coating/residue or embedment, has no harmful effect on plants and a profile is gained to create adhesion of coatings and repairs to a substrate.
Soda blasting leaves a residue and embedmentnutural of abrasive on the surface, if not contained properly plants will die, not enough profile is gained for proper adhesion of epoxies and coatings. It can also cause adhesion loss in metals because it acts as a neutralizer. Soda is a base, most automotive primers these days use acid for adhesion on lightly profiled metal. If the substrate is not washed and sanded properly after blasting with soda, delamination can result. Soda is excellent for food grade requirements, for cleaning, odour suppression and light blasting where no profiling is required. It is the least aggressive of all abrasive blasting, the next less aggressive would be dry ice. Soda blasting will also not remove rust or corrosion.
Dry Ice blasting is broken down into media sized particles, vapourizing on contact, leaving nothing but the debris and contamination being removed. It leaves absolutely no profile for adhesion. It is an excellent method to clean and strip substrates ex. electrical rooms, panel boxes, mould and smoke in attics and hard to clean areas.