Reusable static sheets that turn walls (or any surface) into a whiteboard.
magicwhiteboard.co.uk
magicwhiteboard.co.uk
They work pretty well; you have to take care not to get crinkles or wrinkles in the sheet of course, and not be too decisive with the eraser or you'll pull the sheet around on the wall.
The major problem these can have is that there is no border; the sheet is very thin and its easy to slip up and draw outside.
I fix that by drawing a border (with a red marker -- hard to miss).
Would love to try that paint, but I have a (perhaps neurologically unsound) love for really, really big whiteboards. Me trying to compensate for something, perhaps...?