Normally you don't... If your workflow is correct smooth edges are produced by anti-aliasing, and preserved all along.
An way to "fix" is to add that small Gaussian blur , and then apply contrast to sharpen the edges. But this also rounds off corners.
An way to "fix" is to add that small Gaussian blur , and then apply contrast to sharpen the edges. But this also rounds off corners.
Aliased:
"Fixed":