Acrylic paints can be cleaned off glass much easier than you may think; in fact, many window-painting artists use acrylics for their holiday window decorations. Soften the dried paint with water; then scrape it off with a plastic gift card or a putty knife.
Things You'll Need
Warm or hot tap water
Plastic gift card or putty knife
Bowl or spray bottle
Pick at thick blobs of hardened acrylic paint with your fingernails or the edge of a butter knife. In some cases, the thickness of the paint makes it soft enough to pull off with ease, especially on a smooth glass surface.
Fold a paper towel several times; then soak it with warm or hot tap water.
Rest the wet paper towel over the dry acrylic paint for several minutes. If the paint is on a vertical surface such as a window, hold the wet paper towel in place for at least a minute or long enough to soften the paint.
Remove the paint by scraping it with a plastic gift card or putty knife, depositing the rubbery paint shavings onto a paper towel. Wipe off the scraping device onto a paper towel as you work, so you can see the surface you're cleaning a bit better.
Clean the glass afterwards with equal parts water and white vinegar; mix the liquids in a bowl and dip in a lint-free cloth to clean the glass. Alternatively, pour the liquids into a spray bottle for a speedier way to clean a large surface such as a picture window.
- If the paint is on a small, washable glass object such as a drinking glass, soak the glass in water and use a nylon scrub pad -- the type used when washing dishes -- to remove the paint. Pick up the paint bits and deposit them into the trash instead of allowing them to go down the drain with the water.
- Use a scrub pad instead of a scraper if the glass surface you're cleaning is not smooth.
- If the paint is difficult to remove from a flat glass surface, use a razor-based sticker-removing tool or scraper to pry off the paint.