u/BiscottiOk2611

I finally caved in and bought my fist real figurine- this adorable Dan Heng which I love to bits.
Sadly I noticed this tiny white stain on his tail. I tried removing it with some warm water and dishwashing liquid, then with a bit of hand sanitiser and lastly with a soft rubber, but as you can see it didn't come off.
So, I wanted to ask if any of guys had any tips or ideas?