Removing paint which has leaked into other areas

[Hockeynut]

I have a DEX210. On my first ever try of spraying it with a simple scheme I have ended up with some of the colour leaking onto other areas of the shell. I have used the Tamiya Spray paint.

I was wondering if there is anything that removes it well? Tried my wife's nail polish remover and it barely made a dent.

Thanks,
David