I spray painted my car’s hood. now how do i make it shine so i can see my reflection ?

I Primed it
Then sanded it using 300 grit
then base coated it
then clear coated it
then i have a buffer which i thought would bring me a nice shine but it hasnt done nething for me?
do i have to have some thing like a padPorter Cable 7424 Car Polisher??? what other options do i have ?