G1 Unknown marking stain on forhead

[Snoopy]

Hello
i recently picked up my first G1 at an opshop looked like it would be a easy repair had some sliver paint on it and messed up mane and tail.
Once i started to wash them everything was fine but the drawn on spot right by their eyes. It started coming off green ((non of the other paint on this pony did this)) i managed to remove most of it but now their is a faintish green snowflake inbetten their eyes and i'm not sure what to do. what would you guys recommend
((little fainter than what is showen in the image now this was taken before i managed to get more off))

 

[Tak]

It’s definitely on the outside? Sparkle ponies are difficult… I would keep trying, maybe with a magic eraser, though be careful of the eyes.

 

[Snoopy]

It’s definitely on the outside? Sparkle ponies are difficult… I would keep trying, maybe with a magic eraser, though be careful of the eyes.

Yeah it definitely is when I look though the head I looks like it’s on the out side + I was coming off at one point and the glue was still on the head wen I picked it up. I’ll have a go again with the magic eraser