You won't find a smooth edge presidential proof

Unlike the presidential business strikes, which are made with a 2-strike method, the presidential proof coins are made in a single strike process in which the edge-letters are added at the same time the obverse/reverse designs are added. As such, it isn't possible to find a presidential proof that has 'accidentally skipped a step' in the process and avoided having the edge-lettering added.

Even so, I wonder if we'll see people trying to remove the edge lettering and market them as "errors."