$600 to sand/soda blast eng compartment and underside?

I think that is what my friend paid to get the undercarriage and engine bay done on mine. But my car had no undercoating. And they came to him. Local place here in WA. wanted close to 2k to do the entire car with soda.
Not to hijack, but I was in a local welding store the other day and they had a flier for dry ice blasting, wonder if it is a better process than soda blasting in regards to media being left behind etc......