White marks on bath

[tearinghair]

While using a grout pen to whiten the grouting between tiles on the bath surround, we've managed to drip some white spots on to the coloured bath surface. I can't get it off with gentle rubbing, but don't want to risk scratching it. Any suggestions as to how to get rid of them, please?

[The Builder]

Possibly something like "T-Cut", an abrasive used in car re-spraying. Brasso is very similar. Try that.

[tearinghair]

Thank you, I will. I think I have some brasso at the back of the kitchen cupboard - probably been there for years!