Split the alternator and it ‘s not bad that two pack paint works well so a quick sanding and more paint should see it good for another two years better than buying magnets.
Surprising that the end has not rusted the bubbles are just condensation
They also have not lifted from the disk.
The stator got rubbed a bit but it’s only paint damage but you will see that the tape on the coils has bubbled through. This might be from gassing as it looks like the stator got a bit hot but seems to be ok. This was cast with polyester.