Let it dry, and dry, and dry......
Hint - if you sand it, and it begins to pill and ball up... its not dry, probably due to the coats being too thick, and applied too rapidly.
Assuming its "dust sanding dry", you can wet sand it with 600 paper. That will remove the texture and orange peel effect. After that, just buff it out with compound. I like Mothers mag wheel polish as the first compound, followed by Turtle wax white compound. You can start with the Turtle wax, but it will just take a little longer. Follow up the compound with car polish... non silicone type... and you got a whole lotta shine goin' on.