You can remove paint pen from glass by using a soft cloth and some rubbing alcohol or dish soap and warm water or even some glass cleaner.
If the paint pen is not coming off easily you can also use some acetone based nail polish remover or even some paint stripper.
If you need to scrape the paint pen off the glass you should use a plastic scraper so that you don't scratch the glass.
A magic eraser can also sometimes remove the paint pen from the glass.
To get ink off of glass including removing Sharpie and other permanent marker inks from glass you can use some glass cleaner, nail polish remover or rubbing alcohol.
Rubbing alcohol or nail polish remover are the best ways to remove the Sharpie and other inks from glass.
You can pour a little rubbing alcohol or nail polish remover on a cotton ball or washcloth and then gently scrub the ink from the glass.
It may take a few tries to get all the Sharpie ink or other ink off the glass but it will eventually work.
Then after getting the Sharpie off you can spray the glass with some glass cleaner and wipe it clean again or use a squeegee with some clear water as well.
Sharpie can be used on glass although the writing on the glass from a sharpie will be mostly permanent unless you remover it with the rubbing alcohol or nail polish remover, although it will also fade overtime.
Also sharpies are not truly opaque so the black ink from the sharpie will often appear more of a blue-brown color on clear glass.
The kind of markers you can use on glass are acrylic markers, permanent markers for glass and glass paint markers as well as sharpie and other permanent markers.
If you want to remove the writing from the glass eventually you should use a specialized marker for writing on glass but if you don't care if the writing is permanent you can use a Sharpie or other permanent marker although it will eventually begin to fade over time if the glass is handled and the ink will still be able to be scratched off.
However because sharpies are not truly opaque the black ink from the sharpie will often appear more of a blue-brown color on clear glass.
Dry erase or wet erase markers and even glass marking pencils are commonly used for writing on glass for temporary writing.
You can buy dry erase glass markers that are made specifically for writing on glass surfaces such as those made by Expo, Quartet or Sanford or even glass markers or glassboard markers from brands such as Sharpie, Faber Castell or even Staedtler.
If you want the writing on the glass to be more long lasting you can use an acrylic paint pen or permanent marker on the glass.
Before writing on the glass make sure the glass is clean and dry and wash it off with some soap and warm water and allow it to dry and have a clean surface.
A glass marking pencil is a specialized pencil that is designed for marking glass.
Glass marking pencils are designed and made so that they are able to to leave visible and temporary marks on glass and other non porous surfaces such as ceramics, metal and plastic.
A glass marking pencil often uses soft, water soluble lead which is easy to remove from the glass or surface with a dry cloth or a damp cloth.
The lead in a glass marking pencil is made to be easily wiped away, which makes the glass marking pencil ideal for temporary markings, labeling, measurements or marking lines for cutting.
The glass marking pencils also often come in bright colors including yellow and white which helps to ensure that the markings on the glass area easily visible.
Glass marking pencils are commonly used in glass cutting, glass art, labeling and also general marking tasks on non porous surfaces.
A glass marking pencil is not meant for permanent markings and is only made and meant for temporary markings.
Glass marking pencils can be used on all types of glass.