you would be better off laying the color down for the stripes(in the area where the stripes are going to be, of course), then tape the stripes off, and base the rest of the car the color it's going to be, and the dry time for the base depends on how wet you put the paint down, the reducer you use, and the temperature at which you are spraying.... the reason i say it's best to base the stripe color first, is because the stripes are a smaller area to tape up, versus the whole rest of the car, just to spray the stripes, because overspray finds the most inconvenient places to land, and you'll just have to rebase the areas that it did overspray. if the stripes are totally covered, there's no worry that there will be overspray on them, just make sure you "seal" all of the edges with tape, and don't let the main color get under any of your masked stripes, or you'll just have to touch up the stripes....