Wash your car by hand, use two buckets and a good car wash. One bucket should be filled with soapy water and the other with just plain ole water. Rinse the car off and work from top to bottom going in forwards to back wards motions. Then when you want more suds stick the MICROFIBER
washing mitt in the plain Jane water and shake it around. Then once you do that put it back in the soapy water and keep on washing. Do the top of the vehicle first (all the way around) then move to the belt line, and finally the bottom. I use two different Microfiber hand washing mitts, one for the bottom of the car and the other for the top. This will help the oils and road grime from spreading all over and scratching the paint.
Once the vehicle is washed good get a MICROFIBER drying towel and work from a top to bottom manner until it's dry. (don't forget the door jams)
Then you should go inside to the house and get a wal-mart or supermarket plastic bag, put that on you hand and LIGHTLY run you hand over the surface of the paint. This will really help you understand how many particles are attached to the surface. Once you get an idea you need to clay bar the vehicle. You can find a kit at any parts store or wal-mart, Target for around $20. Clay bar the vehicle per the instructions. You will noticed a smooth finish from then.
After this is where most get into trouble. Some will go out and get a rotary buffer and go to town with a wool wheel when they have no idea what the hell they are doing. Or the will buy one of those stupid Random Orbital cheap $20 machines at walmart that are only good for is a back massage.
You need to get the right equipment to get rid of those. I would suggest a Porter Cable 7424xp Buffer. This buffer is about $120 but it's got enough power to remove swirls, scratches and it's also a random orbital buffer so unless you have a dirty pad you shouldn't induce more scratches.
Get quality compounds, Swirl X hasn't done much for me and if you try to use it by hand I hope that you're stronger than Arnold back in his prime because you won't be able to do much by hand.
I would suggest Wolfgang Ultimate Swirl remover or if you don't want to spend that much just buy Ultimate compound at Advanced auto.
The key to buffing out the whole car is working in small areas with the Ultimate Compound. Don't do the whole care at once, do a 2 sq ft area and then move to another 2 sqft area until it's done. Once you got the car buffed and are happy with the results you can add a good quality wax. At this point there isn't a need for a Cleaner wax; you already did that when you buffed the paint. I use Wolfgang Sealant and then put a good thin coat of Carnuba on top of that to really make it look wet.
You can apply wax by hand or machine, the key is uniform thin coats.
To do a small car like a versa right it should take you at least 8 hours. But once it's done the car would look better than new and amazing.
Go over to WWW.AUTOGEEK.NET
They have a great forum with an amazing amounts of information that you can use. Plus they are also a company that sells auto care products. I'm a customer from them and had great service. Sign up on the forums and ask away, they're some nice folks that will do anything to help you out. Plus look at their Autogeek.net youtube page and they have some great videos that will help you out a ton.
Finally, here are some before and semi after photos of the fiances honda. The afters are only after a buffing and one coat of glaze. I ran out of light and time that night and put on a a coat of sealant and wax after that.
To get to that point I washed, clay bar, swirl remover polish (wolfgang), and glaze (wolfgang also).
Hope this helps.