Human: How do I determine the best way to sandblast a wall? Assistant: 
The best way to determine the best method for sandblasting a wall is to consider the type of surface you are trying to achieve, as well as any existing coatings or paint. You will also want to assess the size and shape of the area that needs to be sandblasted, as this can have an impact on the best approach. Once you have gathered all of this information, you can then decide which blasting technique would work best in your situation. For example, if you need to remove paint from a large section of the wall, dry-sandblasting may be the most effective option.