As I understand it, soda blasting will not heat up the metal bbecause it works in a totally different way than other meadia blasting techniques. most media blasting is an errosive process, that will erode anything in the path of the energetic "spray" of media. soda blasting works because the individual crystals of the soda media will fracture and break apart on impact. this releases a tiny littel "bomb blast " against the surface. when the crystaline structure is fractured, energy is given off. the advantage is that it WILL NOT errode the surface, nly the coating by bombing it off!
From a web site:
"Unlike abrasive sand blasting, sodium bicarbonate particles remove contaminants by the energy released when the particles explodes as they come in contact with the surface to be cleaned. Silica sand on the other hand, removes the material by wearing it away. This is also the results when the sand hits the metal surface, the metal is worn away and the saurface is damaged."
here is a pic of mine soda blasted.
