Bear in mind some of these relate to older M3W's so I'd suggest that you do just drive and enjoy it for a few days before getting too hung up on "fixing" things.
In particular:
Check the Fuel Hose clamps on the Throttle Body hoses.
I believe these are now improved from the original design so should be OK.Make a PVC cover for the vent hole in the steering rack.
Probably not required - maybe a squirt of ACF-50 at some time.
Paint the bare metal part behind the engine where the steering column and steering rack join.
ACF-50Plug the hole in the compensator housing.
Don't bother! It may not even still be there with the current standard Centra unit.
Weatherproof the area behind the seats.
New cars should now have a rubber seal between the aluminium seat back and the body which will help. if it gets wet it will dry out and then worry about further waterproofingPaint the inner front fenders with chip-proof paint.
It won't do any harm but mine are still OK unprotected after 10,000 milesReplace the long bolt that prevents the easy removal of the steering wheel.
Enjoy looking at it and driving it first - you've certainly waited long enough!