ben wrote:
The slab for my garage looks like it wasn't finished right. Take a
look:

http://yfrog.com/58things1j
http://yfrog.com/58things2j

You can see a lip that extends beyond the face of the slab. I'm about
to cut off the rotten siding and replace it. But it's clear that one
reason it rotted is because water would hit this lip and bounce back
onto the siding.

What's the best way to remove this lip without damaging the face? You
can see in the 2nd image that it looks like the face has been knocked
away past where it should have been. I want to avoid doing that
myself.

I was thinking a cold chisel and a sledge, but I've never done
anything like this.

thx

A sledge is way too big and tiring to use to hit a chisel, you need about a
2 pound club hammer for the job. Even that will not do a good job as the
concrete looks old, hard and brittle, and could cause it to break in the
wrong area. If you are determined to remove it, rent a chain saw with a
masonry blade adapter. After you remove the siding you will have a little
more room to use it to cut back the concrete or at least make a cut deep
enough that you can snap off the excess cleanly.