Damn government. It's no different than a extra garage with no walls.
I agree with CRH, unless you're going to get a custom cover made out of that super soft car cover stuff, mucho dinero.
Just wait for a couple months for the new paint to completely cure and harden, then give it a good coat or 2 of a good wax.
Assuming you're getting it painted with automotive paint, sun and rain shouldn't bother it much for quite a few years as long as you keep it clean and wax it 1-2 times a year.
Got to ask, had a buddy spray his beater car with a Wagner sprayer and off the shelf paint, actually looked pretty good.