grout stains in tub

[Scott9985]

I tiled the kids bathroom and mixed my grout in the tub. The tub itself is that fiberglass type(?). I now have little dark brown dots everywhere on the bottom of the tub. Can this be removed? I have tried scrubbing with soft scrub and it hasn't done a thing. maybe some typr of grout release???

Thanks,
Scott

[HayZee518]

Sir, you just messed up. grout is portland cement base with hardeners in the mix. if mixed in a plastic bucket, once dried will flake off and crumble. however you made a boo-boo. you can't remove it without causing scratches and pieces of fiberglass glaze as you chisel it off. Time to get a new tub!