My wife's Forester is Black and the previous owner was pretty abusive to the paintwork, using a clay bar and I can manage to bring it up to a nice shine but there are some pits in the paint where bird crap sat unwashed for probably months and the swirls make me cry but the worse thing is that all over the horizontal surfaces you can see where water has sat on the surface and soaked in, for want of a better term.
It's really hard to photograph and you can really only see it in certain light, but it looks like how paint looks if you don't dry properly after a wash, like dust has settled in the drops, then dried, but this is permanent.
I've tried ScratchX to little effect so the damage must be deep and I've been afraid of using anything harsher, but can anyone recommend a product which could help remove these marks?