i would like to correct a couple of things that have been said in here if i could. since you repainted the whole car and you still have some color left, you dont need to worry about their being a color mismatch. also in regards to sanding it down tightywhitey185 is correct in using a grey 3m scotch brite pad. using 1000 or 1500 is to low a grit to let the paint adhere properly over top of the clear.
In regards to the color, you want to start by a small patch over the tiger striped area and feather it out from there over 2-3 coats for coverage. you want a light-medium coat. finally clear, i would do as tighty suggests and clear the whole quarter and use a blender to finish the sail panel. SHerwin williams automotive finishes has a blending solvent in a spray can which make things very easy, its called BS10, any sherwin auto store should have it. Hope this helps.