If you can feel the scratch with your finger nail as stated above you really can fix it completely without having it re-painted. However, it if its a very light scratch or scuff then you can probably "color sand" it out. Here is what will work:
1. Take 2000 wet/dry sandpaper and soak it in soapy water for about 5 minutes.
2. Use the soapy water as a lubricant as you GENTLY rub the sand paper over the affected area.
3. Squeegee away excess water to see if the scratch is going away. Be careful because you are sanding layers of clear coat. You don't want to rub hard as you may eat all the clear coat and just leave base coat. Base coat can NOT be buff out to shine.
4. Once the light scratch or scuff is gone then you can start the polishing.
5. Take light duty rubbing compound like 3M Light Rubbing Compound and polish the area. If you are not using a dual action polisher machine and doing this by hand it may take several polishings to get the area shiney.
6. Once the area has produced a shine, take some swirl mark remover polish and polish the area again. 3M makes a very good swirl mark polish compound. If you are not using a dual action polisher machine then you may have to repeat this several times until the paint is completely swirl mark free.
7. Once the area is completely shiny and smooth without swirl marks then top it off with your favorite wax.
What I described above is called "color sanding". All professional detailers and painters use this method to remove orange peel, dust and other imperfections from the paint. This is really an art than it is anything else. It takes some practice to be very good at it but the novice can take their time and accomplish this with very good results. If the scratches are too deep and past the layers of clear coat and into the base coat you really can't do anything with it unless you have it re-painted.
You might want to take it to a professional detailer in your area and let them look at it if you are uncomfortable about doing this. Also, visit
Meguiars Online for more information on how to "color sand" and polishing techniques.