and as far as glue...its an asshole. if you can "soak it" somehow with a qtip or something it may help. also a wooden tongue depressor....i think thats what its called, the shit the doctor sticks in your mouth and makes you say Ahhhh, is great for scraping a rim without having to worry about marring it up.
my tubs have always gone soft rather quickly.
and as far as glue...its an asshole. if you can "soak it" somehow with a qtip or something it may help. also a wooden tongue depressor....i think thats what its called, the shit the doctor sticks in your mouth and makes you say Ahhhh, is great for scraping a rim without having to worry about marring it up.