Hello Col,
I'm glad you've found the sealer subject helpful.
Another thing I've found good for removing polish is Comma Manista (for example, see
http://www.wilcodirect.co.uk/index.p...oducts_id=1260). I think it would be safer than diluted ammonia, as it's based on coconut, lemon and it's got a gritty texture which helps scrub the polish off. That said, I can understand that there's something to be said for avoiding getting it on in the first place, and that takes us back to the gloves...
Regards,
Ben