opinions welcome guys

Hi guys! What do you think about the use of gas additives? Please let me know your opinion, if you use and what is the result. Looking forward to your feedback :popcorn2:

hi guys my car is booked in to have the wing mirrors,door handles,bonnet,roof and spoiler covered in carbon fibre also the inside plastics to be done.im in two minds now im not sure if this might be a bit much id appreciate comments,opinions and any suggestions!!!!