Looking very good young padawan. You can sand it now with the highest of grade sandpaper you have.Do it slightly going from the front to the end of the air intake.Try to keep rounding of the top of it.
If there isn't any gap you can find with the nail test, it is OK.
Also I suggest to think over problem with the joints on the MGs coverings.It should be sanded in the same way like the air intake.Of course you need sand them at the joint areas and on sides mostly.At the top of them slightky only to round these . Another thing is the thin Superglue.Can you get it tomorrow?