Prepping for epoxy next weekend. My garage has two slabs separated by a control joint. There was a 1" lip where one slab raised over the past 70 years and so I rented a machine and ground it down to smooth. Took all day Saturday but it's now smooth.
I'm acid washing tonight and then after a couple of days drying, I will prime. Epoxy coating on Sunday.
After sanding the floor but before grinding down the lip:
After grinding the lip down:
The Machine:
