Enjoy the car. Get in it regularly and drive it. Don't fret about getting it wet - it won't dissolve.
Four more things to check:
1) Inspect coolant hoses for any rubbing points against fixed parts of the car - bottom hose susceptible on a +4 IIRC - someone with a +4 will correct me on this.
2) Check the fit of the coolant header tank and make sure none of the pipes are trapped against the wiper motor.
3) Check the lamps for water ingress. If you suspect the indicators are wet inside DO NOT turn on the hazard warning lights or you risk damaging the control PCB.
4) Rattles and squeeks - There may be rattles and squeeks. They all do that sir. You can run a trickle of ACF50 down the wing beeding to both reduce squeeks and protect the hidden parts from corrosion.
I hope your dealer showed you exactly how to erect and lower the hood - always remember to undo the tenax fastners on the side before unclipping at the header rail.
Good luck.
