What equipment/material/knowledge is needed to visually fix a garage ramp
I'd start by pressure washing the ramp with a light degreaser/driveway cleaner to see what defects remained. Some of the colorization seems to be surface stains. Then, you could epoxy-paint or stain it to at least get a uniform look, though that wont help if there are large cracks, voids or holes.  Problem with any coating is that you will be driving on it, so it will be hard to maintain the &quot;clean&quot; uniform look (tire marks) compared to the walking ramp on the right picture.