Yeah, my dad told me about filling (or half-filling) the bath when I talked to him on the phone about it. After it was too late, naturally; if I'd thought to ring him beforehand it'd probably all have gone much more smoothly...

I did smooth the sealant afterwards, using a bit of paper with my finger behind it. It still didn't end up very neat, but it was better than nothing...

Glad to hear I didn't miss much with the sealant remover, though :-)