You can remove decoupage with wallpaper remover, and a plastic scraper. Spray the wallpaper remover onto the decoupaged area and let it set for the recommended amount of time specified in the instructions. Use a plastic scraper to remove the decoupage. You can lightly sand the area to remove any excess.
The decoupage I am familiar with is pretty much like Elmer's glue and is water based unless sealed. See if you can dampen the surface and get the paste to soften and scrape off. Otherwise treat it like you would paint. Get a good stripping product and strip the decoupage the same way.
Henri Matisse did decoupage. Those are definitely art.
Mariarita Macchiavelli has written: 'Decoupage' -- subject(s): Decoupage
Yes you can apply decoupage glue over photographs.
decoupage
Craft Corner Deathmatch - 2005 The Decoupage Dogfight was released on: USA: April 2005
Yes, just be careful what type of glue you are using because it might make the decoupage paper bubble or tear from the wetness.
DECOUPAGE
About 1945.
decoupage
Decoupage 2000 Return of the Goddess - 1999 was released on: USA: 24 August 1999 (American Cinemateque)
decoupage and use as flower pots?
Decoupage is the art of glueing paper cutouts onto other objects Yes you can polcrylic seal over the paper cutouts