Sorry to bump an old thread but this has happened twice now to wifey's GTD which has "special solid paint". The paint is woeful - scratches and swirls if you look at it.
Anyway, 2 lots of birds poo have been removed within 10-15 minutes and yet both have etched the paint. Is this paint different to the old solid paint which seems pretty resistant.
Is a machine polish the only way to get rid of the etching ?
The paint shouldn't make any difference as it's all got the same clearcoat which is what has been etched.
As Joe says, trying to hand polish it out will be a battle, much easier with a DA. That said, I had various bits of bird poo etching on mine and a couple of those even challenged the DA, but a bit of persistence and it was gone.