you can buy both powdered aluminum and iron oxide at the local paint store. they will sell it by the pound(the metals are used as pigment in paint). ive made backyard napalm before.
>put gasoline in vegetable can
>put styrofoam in can(foam melts)
>add as much as you want,until it is the right consistency. the kind the military uses is like molasses. i added styrofoam until it was like playdough, then i put smushed it flat and put it in the clay bird thrower... on fire
>launched
>16 guage
>yadda-yadda
>end day happy