I know a few of you guys have a lot of experience with blasting pools. I've got a 1950's steel inground pool that I'm going to be blasting in a couple weeks. I'm trying to get a more accurate idea on how much surface area I can expect to be able to clean in a day. I'm not really sure how thick it is, so assume it's thick. I have a 375cfm high pressure compressor with a number 7 nozzle. I'm debating on which media to use. I'm thinking coarse black beauty or maybe coarse alox. I'm more concerned about getting it done faster than the cost of the media. Any thoughts on coverage?