Depending on how deep the scratches are (what we call pinstirpes) you should be able to buff them out with some swirl remover, wax and a little elbow grease. I've had a pretty good set of pinstripes on my Ebony, but was able to get them out, although I don't think any of them where white. Hopefully the white comes from whatever you rubbed up against and not the fact that you've gone through the paint....OUCH.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless