Nazi Helmet Restoration Progress: the Stripped Helmet

I have spent several days this week stripping my German M40 of paint and rust.  The pre-restoration helmet is here.  The stripped helmet is at the left.  (The M40 designation refers to the year the model was created.  World War I helmets included the M16 and M18, and more modern helmets were the M35, M40 and M42.  The differences in the last three models are subtle.)

I notice that the rust remover dissolves the rust, but leaves behind a dark mark where the rust used to be. This can be ground off, but I have neither the time nor patience to do that, and, it isn't necessary.

Next step:  priming the helmet.  I am going to use a Rust-Oleum product that supposedly turns rust into something else that can be painted over.  If any small amounts of rust remain, the Rust-Oleum should kill it and prevent more rust from forming.  I'll give it two coats.

The question is, where can I spray paint my helmet with the primer and later the paint?  I suppose the kitchen table is out of the question.

I have a nice work bench in my garage.  Unfortunately, it is covered with storage boxes.  Maybe I can remove them temporarily.  I have to paint the helmet when my wife is gone for the day, probably on a shopping trip to San Jose.  Otherwise, I will have to paint it under an extreme barrage of nagging, warnings of doom and destruction, and loud verbal expressions of angst, fear, horror and disaster.