Admin please stop me, I may have hijacked this thread, promise I will stop.
Mine are a mix from yesteryear and brand new ones too. Scale planes never go out of date. F-15 ducted fan (huge Byron), SR72, P40, FW-190, Spitfire, Tractor (crop...
Salt water, YES.
Fresh water, ???
Rinse with clean water and let it air dry for a while.
I'm not familiar with the mini 4 pro but check for a sd card if available that may contain owner information and content of it's last flight.
The card...