Melissa,
You didn't mention your medium, so I will address watercolor because that is what I have used in conjunction with frisket film.
I never had a problem removing the film, except when I replaced a piece after spraying before the airbrushed watercolor was totally dry.
I have used both hot press and cold press, usually #140.
I have left frisket film on raw paper, as well as airbrushed areas for more than a week with nary a problem.
Sometimes, I *have* had trouble getting the frisket to stay stuck to the painted surface after painting. I found the drying watercolor overspray would shrink, causing the edges of the frisket to curl up after several days.
__________________
Will Enns
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