Walkinshaw87

Hi I've never resprayed a car before and I'm getting the front panels new front bumper and the roof resprayed due to paint fade. What i want some advice on is should i get the rest cut and polished before to bring it back up to match the new paint as much as possible or do i get the whole car done afterwards. I have no idea if the new paint would need it but i see some threads here asking when they can cut and polish thsir new paint job. Thx for any advice