Go over the wallpaper with a sharp scraper and try to knock as many of the woodchips off as possible....then score it as mentioned. I then use a steamer to get it off.
Score the woodchip with a scraper, then apply a thin mix of wallpaper paste, wait 10 mins or so, then apply again. Keep doing this until the woodchip comes off the wall easily.
give me your address and ill send my 3 year old son round! he will strip your walls in minutes and wont want paying! I just wish he would leave my walls alone, lol.
If you have loads of this paper investing in one of these might be worthwhile. I found it made a time difference when scoring a large area - to then lift off with a steam stripper, it also caused less damage to the wall under the paper in our older properties.