small vent looks sooooo much better also keeping it red is a good thing too.

Would try as above, cutting it back and seeing how you get on, if not just cover with vinyl as you first suggested, black would be a good option. You seem fairly good with a tin of paint, why not give it a go yourself, keying the roof up may flatten it all off ok.

Now the question is, would the lower rear spoiler look good in black too?

you'll have to keep it with all the work your putting in