If you do take it off, I'm curious as to why you say it's £180 down the tubes. Won't the place that sold it to you take it back? Looks like it's in perfect condition...judging by the pictures anyway. If they won't give a full refund on installed items, maybe they can take it back minus a restocking fee so you don't lose your entire £180?
Personally, I don't think it looks all that bad and I have to agree with the others and say paint it to match the tank.