If it's acrylic you should be able to polish it out by using 1200 / 1500 / 2000 grit wet and dry ( use it wet ) then buff it up with some brasso and a soft cloth.
Start with the 1200 and work over the scratched area then when you move to the 1500 go slightly wider than you did with the 1200 to remove the grit marks left from the 1200 and same process for the 2000 grit.
If you need to go finer than 2000 grit then I can supply you with some micron paper. 60,30,15 and 9 micron, Note: micron paper works the opposite way to grit rateings eg: 9 is the finest.
Hope that helps ya out.
Tank Man.