Shouldn't be an issue at all. Any new panel should be treated with Waxoyl as par for the course.
As a result of that I always put my car in gear when I park it (however then you risk trying to start it when in gear and leaping forward into another immovable object! )
Why would you not use the handbrake Roy out of curiosity? Just no need?
Ouch. Gutted. I'm sure it's already been said but, leaving it in-gear FTW. On all but the steepest of hills, this should hopefully save you in the event of a handbrake failure. I never even use my handbrake for normal parking. I pop it in first and apply the HB only if it's on an incline.