List of things to be done:
- Tailgate removed, re-sprayed and then re-fitted
- Front bumper replaced and re-sprayed, including colour-coding
- Rear bumper replaced and re-sprayed, including colour-coding
- New number plates front and rear
- New number plate holders front and rear
The garage reckon they only need the car for 3-4 days 
Ben,
Are they removing the bumpers as well or are they already off?
If you colour code the plastic at the bottom of the bumper like someone said they will have to be flattened, but also they will need plastic primer.
Is it worth doing if you are upgraing the exhaust in future plans?
Just out of interest are you debadging the tailgate and what have you been quoted for the work?
The time you have been quoted is about right as they will prep, prime let that rest for a day before top coat and laquer and polishing
