When a Fingernail Won't Work, Try HEWER Safety Scrapers

HEWER MultiSAFE HK-7670 Safety Scrapers are useful for peeling off thin sections of masking tape, stickers and paint over spray from smooth surfaces. They are also extremely useful for cleaning up your workbench, and for removing paint and clays from glass surfaces. I always have a general purpose miniature scraper and blade from ScrapRite sitting on my workbench. If I am working with acrylic paint, pva glue or numerous other materials, it can be easier to let the adhesive or paint dry on my laminate or flexible cutting board work surface, then use the scraper to peel off the dried material.
HEWER MultiSAFE HK-7670 Safety Scrapers are also useful for installing thin lines of stickers on windows as miniature 'lead lines'. You can press down on the sticker with the blade, with little danger of damaging the sticker. If it gets out of line, the plastic blade can be used to nudge stickers back into place without damaging the acrylic or painted surface underneath.
If you need thin lines or designs made from paint, you can paint your design on glass, then use the plastic razor blade to remove it without damaging it for use as a sticker or design. This can be a good way to make your own custom lead lines for miniatures. 
HEWER MultiSAFE HK-7670 Safety Scrapers are not simply a tool for scraping, but more functions than what you expect.