I've had plenty of experience with flood/fire damaged pins.

First thing is to remove all the light bulbs from their sockets and unplug all connectors. This gives a chance to get the water out of them. Trapped water will corrode the sockets and connectors.

Prop the playfield all the way up against the headbox so the cabinet has plenty of ventilation to dry out.

Now get out a hair dryer and start drying off the playfield with forced warm air.

Set a desk fan in the cabinet to help dry it out.

The key to saving any flood damaged machine is to get it dry right away. I've saved a Williams EarthShaker that was completely underwater all the way over the headbox and today you'd never know it was in a flood.