One method that works well is to rent a commercial buffing machine complete with a pad and sanding disks. I suggest using the course grit sanding disks.
If you have never used a commercial buffing machine before, start in the middle of the floor away from any obstructions and practice a little first without the sanding disks. You control the direction of the buffer by raising and lowering the handle.
After you have the feel for the machine and how to operate it place a pad and sanding disk under it and begin sanding the floor. Change disks as they become clogged or worn.
Clean up all the dust and dirt and etch the floor with a 5% solution of muratic acid and water. Rinse well and allow the floor to dry completely before repainting.
Glenn
Moderator: Construction Systems, Foundations, and Masonry & Stone
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