Read the posts on this forum for wet-sanding/buffing...
http://www.spiuserforum.com/index.ph...-detailing.18/
Also,
if the resprayed panel doesn't match the rest of the car look into ghost pearling the whole car to hide the repair. That was my plan B if my "paint in pieces" didn't match on my goat.
(disclaimer-not sure if this will work but who knows).
https://www.paintwithpearl.com/