Help with grinding mishap for ArmorPoxy SPGX

[andybgood]

Hello,

I rented an edco floor grinder and have obtained unsatisfactory results so far with a very uneven grind. These pictures are after about 12 hours. The machine was leveled correctly so I’m not sure what went wrong. What tool should I try next? I need to get this resolved this weekend.

Thank you.

 

[BillK]

I have never done it but looking at their machine and videos I would say your floor is probably very old and hard and just needs a ton of time to make it anywhere near right. Either that or a much larger machine.