I've used a really good Turtle Wax Colour restore before with pretty good results. Its in their Platinum range so its not the cheap stuff you can buy, give that a try with an orbital polisher. Job lot will cost about £30 mate.
Give the car a good clean. Dry the car off thoroughly. Apply the restorer, wait for 5-10 mins to haze, buff off with a the machine polisher. This will instantly reduce the appearance of blemishes, swirls and small scratches. Then I've found using a colour based polish gives it a deep colour shine. Gently apply the polish and leave 2-3 mins to haze. Buff off with a lint free cloth. Then if you want the full monty job, wax the car like you've polished it, then you can give the car a top wax gloss. This is really liquidiy and so easy to apply. Go over the car quickly and by the time you reach the point you started you can again buff off with the machine polisher/buffer leaving your car with paint that looks deep enough to paddel in!