I haven't put together my complete buildout plan yet, but I expect that most of the preparatory steps are the same regardless of where I'm going with it. The space is approx 100'x100'x16', and contains a grid of alternating concrete and steel columns. It has seen decades of use as an industrial space, leading to a very rough floor, chipped walls and columns, etc. There are also sections of raw cinder block wall in some places.
What general steps should I look to take first? I know I need to pressure wash the floor. If I pressure wash the walls I expect the paint to start peeling. What's the best type and method of painting to cover that much surface quickly? Is there something I can do to the floor to fill in all the chips and scratches, without adding a complete new surface? .1/8" of leveling compound across 10k square feet promises to be expensive and time consuming, especially if the floor isn't level to begin with. Whether I fill in the chips or not, should I seal or stain or otherwise treat the floor to make it more durable?
Are there any obvious things that I'll regret not having done six months from now?