When it comes to spraying concrete surfaces, there are a few things to consider. The size of the surface is the most important factor. For large surfaces, such as commercial floors, a sprayer is the most efficient and cost-effective option. For smaller surfaces, such as garages or outdoor areas, a paint roller or other type of roller is sufficient.
Laminating is another cost-effective option. Spraying and fogging are best used when the temperature is above freezing and the humidity is low. Sprayed concrete is the term for wet sprayed concrete, while gunita is the term for dry-process sprayed concrete. No matter what type of surface you're spraying, it's important to take safety precautions.
Wear protective clothing and a face mask to avoid inhaling any particles. Make sure you have adequate ventilation in the area and that you're using the right type of equipment for the job.