Thanks guys, appreciate the comments.
It really is beyond paint correction, it's been done twice in 6 months and is still not great. Even gentle cleaning creates swirl marks and the paint is thin and super soft.
I'm against a wrap simply because the paint underneath would still be rough once the wrap is removed.
Not too bothered about resale as mine is one of the oldest and highest mileage examples plus it's modified, it'll always be at the bottom of price curve.
I'll probably get it done in September so I'll speak to a body shop and see what they think. Sounds like I'll be sticking with black but quite tempted to go metallic.
Does anyone know any special metallic blacks?