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I'd like to put some kind of easily removed clear (or semi-translucent) material on my large windows so I can use them as a dry-erase surface without blocking out the light. Any suggestions on what to look for? Cheaper is better : )

Window with writing on it Another window with writing

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2 Answers 2

up vote 9 down vote accepted

You can write on glass with a dry-erase marker and it will come off with a paper towel. (Try it yourself if you don't believe me!) I've never left it on glass long enough for it to need any sort of solvent to remove, but I'd think that normal ammonia-based window cleaner would work OK; if not, you could always use dry-erase cleaner as a last resort.

The reason this works is that dry-erase boards (the rigid kind at least) have a thin ceramic coating to prevent the ink from penetrating pores in the white plastic substrate, and glass is a ceramic.

If there are any stubborn dry erase marker smudges left over, a sharp #9 razor blade will easily remove them.

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I do it all the time for calculations and software design, or to teach my kids math. Get high quality pens as it is harder to see than on a white board. If you really need to see it, use grease pens and some detergent and elbow grease for removal. –  Peter DeWeese Jun 23 '11 at 2:05
If you have stubborn smudges, scribble over them with a fresh pen, and then quickly erase. This even works with permanent marker stains. –  Alex Feinman Nov 12 '12 at 18:16

Don't know about windows, but the shower backer board you can get in 4' x 8' sheets a most home improvement stores will work well too. Pretty much the same material and really cheap. We used these at a company I worked for previously and then cut and attached molding around them as a frame to dress them up. HTH.

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Interesting. What did you use for the framing material? Painted wood would be an ink magnet. –  BMitch Jun 23 '11 at 11:50
Did the same thing. $12 and a little liquid nails later and you got a nice, cheap whiteboard. Use a little simple green to clean it once in a while. –  electricsauce Jun 24 '11 at 13:48

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