Rattles cans are a great way to paint a car if you’re looking for an inexpensive and easy option. Most rattle can paints contain the same chemicals as professional-grade automotive paints, so they provide similar results. A few coats of spray paint will allow you to change the color of your car without having to spend large sums on hiring a professional painter or buying expensive equipment. Before painting with a rattle can, however, make sure that the surface is properly prepared. Sand off any rust spots and scratches until it's smooth before applying primer and then several coats of paint according to manufacturer instructions. Allowing proper dry time between each coat is essential for achieving good results from your project!