Quote Originally Posted by Mark Wooden View Post
Apply blue masking tape tight to the cracks a couple of layers deep; fill with the epoxy to the top of the tape and when it's mostly hard, pull the tape and carefully shave it off with a sharp chisel.
Yes, this is the best way to go. All epoxy shrinks as it cures to one degree or another. A perfectly level uncured epoxy patch will have indentations in it when it is cured. I use a razor blade instead of a chisel but I imagine a sharp chisel would also work well.