if you want it to look good, dont use just spray cans. get those actually sprayer things that use compressed air i think to spray. you buy the paint, pour it in the sprayer-thing (forgot what its called) and just spraying light coats. dont forget primer, and sand paper. make sure you have patience cause it takes a long time. sand between coats and if there are any imperfections just dont spray over and try to cover it. for a first timer, i wouldnt suggest a whole front bumper, go practice on something smaller.
