I made a couple of failed attempts at "spot repair" before stripping it down to what you see above. The good news is that the veneer patch turned out great - probably the best I've ever done. The bad news is that I'm back to ground zero and into the second week of a project that should've taken just a couple days. Oh well.
Haste makes waste. The good news is that, this time, my lazieness only cost me some time; the damage is repairable and it's not a total loss. The bad news is that, once this project is a memory, I'll probably make the same mistake again. That's how I roll.