Cardboard box and hot flying metal . . . I'd be careful!!
I've bought a portable bandsaw from Habor Freight to reduce some of my dust creation. Otherwise I hang a couple of thick welding curtains from the garage roof to enclose my work area to try to contain the dust, as well keep hot metal from the car that might be in there being worked on. A bathroom extractor fan in each side wall helps - not blown up yet so dust not got in the motors yet . . .