UPDATE: link to steel legs:
Make your own concrete table at home!
Learn from my mistakes so that you can save time!
Tips: Use Plasticizer! can be bought here:
And vibrate more, that saves you from a lot of work. Use a different kind of sealer, if you wanna save time. (But then it might not be possible to get the structure that I got)
Cast some wood in it! It makes it much easier to fasten the legs.
UPDATE: I have been using the table for a month now, and it is no longer shiny. I could polish it again to get it back, but I will just leave it matt.