Friends, I'm not proud of myself.
I had a spare ESP32 Wroom and a LoRa SX1278 module, so I thought I'd make an APRS gateway, but very compact to put in its own antenna tube. So I tried to desolder the microcontroller pins to save space, wanting to solder the wires directly into the holes.
The 450° C soldering iron and copper braid weren't very effective, so I removed the pins, but alas, the PCB pads became a disaster :(
Isopropyl alcohol rubbed vigorously didn't help, on the contrary.