Martin Jensen, author of How to Get What You Want, provides the practical solution.
You are innocently parked in the carpark and discover that another car has brushed against yours.
Or you scraped another car - or a column in the carpark itself.
The result? Streaks of paint of duco on your car.
Your car is not too damaged but the foreign paint or duco seems to be there for good. How do you get it off without affecting your duco underneath?
No. that will take off your duco as well.
The solution is simple and very effective.
Pour a generous amount of metholated spirits on a piece of cloth and start rubbing.
Lo! The offending duco comes off easily and your duco is not damaged at all. Soon you are back to your gleaming original duco and, as they say, "A galloping horse wouldn't notice."
I have used this method many times on my own and other cars. It's infallible.
Go and do thou likewise.