I say it's your money and do what you want with it. I need to wet sand my bumper below to get it as shiny and as dark as the rest of the car, but this is what you get from optikwerks. And hopefully you are not shy with body work.... The worst fitting piece of fibre glass ever. There was a spot next to the passenger light that the people f***** up cutting and I had to re fibre glass and body fill over it. Also the piece under the headlight and under the hood where it meets up was very bad. About half an inch of gap. So I had to body fill it enough to cover it and make it match up properly... Also where matches up the the wheel well was pretty bad so I had to body fill it so it was similar looking to the fender... So in final get it if you want to do a lot of work.
For me I had fun taking a few weeks to shave, sand and putty the bumper to make it fit. It was relaxing and to see te finished product wasn't total crap was icing on the cake. Just need to get the bumper shiny and il be done.
Total work needed: 10/10