Painting time is a week away! Need some advice on my options.

[Eternal]

Ok then lets see!

Aim:
Get the chassis painted over a short period of time. As i share the garage and need to get it finished before it gets all dusty from the wood work guys. Also have large areas of steel sheet that will require a fair amount of paint.

Tools:
Air compressor
Gravity feed gun
Fair bit of space.
Use of 3 people over 2 days (including sanding and prep) after it would be just me.

Finish:
Rollcage to be spayed to give a nice finish.
Floor im thinking roller brushes and air gun.
Everything else roller brush and paint brush.

From that what would you guys recommend? I like the idea of hammerite as its easy to get. But have heard loads of horror stories about flaking and problems with it sticking to itself. Epoxy mastic 1-2-1 is ok stuff but i found the finish of my wishbones poor and found it a pain to use.