That's a lot of rinsing! I never rinse between polish and wax.
I did use a soft toothbrush for small areas, is this where I went wrong? Should it of still stripped paint?TBH there is no way Bilberry would have stripped of any paint of your alloys. Its not acidic and is quite a safe wheel cleaner. What did you use to agitate the alloys?
I've got some really embedded grime on the front of my rear wheel arches that won't seem to budge, I've just tried Chemical Guys Strong wash which was awesome at getting off flys but didn't touch this grime.
It seems to be really embedded, you can barely feel it running your finger over it. Is there something stronger I can use or would it need a professional detail?