I'm going to use a pressure washer to take the old coating off of my new garage floor. Do I need to cover the drywall with tarp or something before I do this? It seems like that much water in a relatively enclosed space might be bad so I want to make sure I'm not setting myself up for failure.
On a side note, I'm not sure what kind of coating is in the garage now. It's a grey floor with no flecks, a very thin appearance and there is bare concrete in several places from tires. Is there a method to finding out what a particular coating is?
On a side note, I'm not sure what kind of coating is in the garage now. It's a grey floor with no flecks, a very thin appearance and there is bare concrete in several places from tires. Is there a method to finding out what a particular coating is?

