I am looking for some paint that does not scratch off very easy off aluminum. What kind of paint should I use? Hope someone can help me out there.

Frist thing you need to is get some scotch brite pads. You should be able to get them at any auto part stores. Then rub the metal intill it has a fine texture to it. After that blow all the dust off of it. Or you can use a wet rag. Then apply two coats of primer. But us a primer thats color is close to the color you are useing. Let the coats dry as the can says. Then take the color you want apply all the coats in a thin layer and let them dry to what the company says. Now if you want you can apply a clear coat. This is how all body shops paint all types of metals. By the way any type of spray paint will work. What are you painting by the way?