This unit is like an efficiency apt, 1940 building, 4 storys and it was used as a storeroom for the last 25 years. Floor was full of paint and crap and grit,, I tried to not do this floor but they insisted.. Only one pic was good enough to use because of lighting and its a door way pic... Cleaned it with grout master it was so filthy and fan dried but it was sticky and gummy. So my fix was to flash dry the first coat of wax, which turned into flash drying two coats of wax so I could get a clean dry surface to put down a heavy shiny coat of wax.. They results were awesome to the customer but to me I would have put down a new floor. The whole building of 30 units is this same ole old old old wood floors. this was just a livingroom and tiny bd that's it the only closet was 4x4 small.