I presume you have wet sanded with 1200 or 1500! You then need to da sand wet with 3000 discs!
Then it's a case of machine polishing it back the 3000 starts bringing it back then compound, polish,wax and a good sealent!
Tbh a decent bodyshop would not have let it go out with orange peel if you have paid for a respray why should you be finishing the job! I wouldn't expect any of our customers to have to do this!
Hope this helps