I did once. I very rarely have a need for a black cap-toe but wanted a pair on hand when necessary. I checked Ebay one day and a pair of Park Avenues came up with a BIN for $50. They weren't terribly worn, but one shoe did have a white scuff on the toe. I figured they were worth the gamble at that price.
While I tried less abrasive options first, I finally used nail polish remover to erase the white scuff, which left a visible haze:
After a few very light coats of AE black polish, the haze disappeared and color started evening out:
Finished, after more light coats of black polish and relentless brushing and buffing with an AE polishing cloth:
Very happy with my $50 Park Aves.
Those are great! I average about $75/pair on eBay and have gotten, Vernons, Daltons, Norwich, McTavish, and Strands. All were barely scuffed on the bottom and all but the Vernons were 1st quality.