repair economic total damage

Hello, I hope someone can help me here. I was driven by someone at the back and I had an expert report done. Repair costs 2144, 51 VAT 407, 46 Total cost 2551, 97 Replacement 1875 Remaining value 400 The damage is actually relatively small and could be repaired by a friend because mainly on the bumper which would be replaced. How do I have to have after the repair procedure. A review done? Failing to read somewhere that you would get the already pulled off then again? And how is it if I got someone on it again after the repair because the car is now in this list and you have been told then nothing replaced? Thanks for your help in advance. LG Sandra