I experienced a similar case in my BMW ........initailly it seemed hopeless but after about 2 weeks time...I tried the "mother" 's pre-wax cleaner and those spots were eleminated right away...........
p.s. Apply it with a bit more stress...otherwise it may take a loooooooong time....and no worry as it won't harm the paint but clean the surface .....

One more suggestion.......in case if it don't perfect the surface.....then U may go to your familiar car valet shop and ask if they can apply the 3-M MACHINE GLAZE (should be white in color) to those defects and I am quite sure those spots can be eliminated......unless the liquor has been eaten but it seems not the case here............

again....hope it helps u out......