blue mark on my new bath [weeps]

[aquavit]

Blasted plastic hippo bath toy thing has left a huge bright blue streak down the middle of my gorgeous new bath. I have scrubbed with everything I can think of and can't shift it. The only thing I've not tried yet (as didn't have any) was soaking in biological washing liquid, though I did leave a stain remover on it overnight the other day.

Any ideas? Please help!

Have you tried rubbing it with a pencil eraser? That gets the black rubber marks of wooden floors, might work on the hippo mark. Or WD40 which seems to work on everything?

T cut (what you use for scratches on cars)

my OH runs a bathroom company and it gets everything off!

Bar keepers friend

I've been told that cif works on this. But not tried, and I suppose it could scratch the bath.

so that's not much help is it?

Cif cream cleanser,gets nail polish off mine!

The back of a green scourer and soap.
Or the magic eraser block

you are all marvellous, thank you. I'll try them and let you know what works!

Simple turned out to be effective: soap plus wire wool (used very gently to avoid scratches) did the trick. Thanks for all your replies.