For those with a strong sense of adventure and a Torx T6, I have found that ultra-fine sandpaper can remove fairly deep scratches on my 7250 housing. Just be very careful around that metal frame surrounding the screen. Also, after removing the screws, be gentle when prying the two halves of the shell apart.
I had already replaced my original housing with a "new" one from Promobility when yesterday the "new" one took a tumble on concrete, thanks to the 360 swiveling Blackberry case once again ejecting the berry forward from the 180 degree position. Anyway, the replacement housing is now gouged beyond repair, but I was able to sand the old one to the point that all of the scratches are now difficult if not impossible to detect. Only a pinpoint of one of the scratches is left, the remaining ones have vanished.
I am going to store the repaired case until the next time the berry decides to take a leap.