I have to respectifully dissagree with the comment about using a rubbing compound.
A while back, my Dakota was parked what I felt was a reasonable distance from where I was spray painting a storage shed.
To my dismay, it was still in the path of the overspray, even though it was about 100 yards from the work area.
Any way, I used 3M fine cut rubbing compound by hand, and not only did it remove the dried on overspray, but smalll scratchers as well.
The big plus was, it was easy to use, and the shine was unreal.
I finished with 3M show glase liquid wax.
My 59 Convertible gets the same treatment, but Black always shows a shine better , which is why I am including a picture of the Dakota so you can see the result.
The picture below was taken about two months after I compounded the overspray.
One thing I have always done, and will continue to do, is use a light spray of glass cleaner every day, and dry with a good clean, soft towel.
This is the glossy shine that the R/T has all the time.
I only wax two or three times a year, but the truck gets the windex treatment just about every day.
Many have said the amonia in the windex is not good for the paint, but I can only say, look for yourself.
The shine is awsome, and I see no damage to the paint at all.
I never use any soap when washing the vehicles, I don't have too.
The wax is so good, I only need a damp rag, or just the garden hose, if we have had a rainy day.
Dirt just doesn't stick to the body of either the convertiblke or truck
As for time, it takes me about 20 minutes each day to keep these two vehicles looking like they do.
Time well spent.
Bob.