I have a softball-sized scuff on my bumper.  The car has nice metallic paint, so I'm thinking I need to repaint the whole bumper for best results.  It's been a while since I've done this.  I have an old Binks #7 (?) siphon-type gun.  Nowadays, all I see on TV and in the magazines are the gravity-feed, low pressure style guns.

What would the pros recommend for an amatuer like myself...  Spend the money on a modern gun that I may never use again or use the old faithful Binks?

I would just order a spray can from us. Much easier, pre-mixed and ready to go.