Congrats on this beauty, it's looking great
Echoing what 2SS Capt posted, I wouldn't touch the car at all (cue "the museum rule") until I'm able to fully wash off all the salty dust.
Salt doesn't do much until it's activated (gets wet) and turns into brine, at which point it will start to aggressively corrode any unprotected area, any flaws or minor underside scratches. You want to wash the car very thoroughly to make sure all the gunk is off.
In the meantime I'd look into iron remover products as well to get rid of any railway fallout, and of course some form of paint protection would be ideal once the car is clean.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq
Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune
1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
4300 - 2/27/18 | 4B00 - 3/01/18
4200 - 3/05/18 | 4800 - 3/14/18
5000 - 3/16/18 | 6000 - 3/19/18