I am seeking to make use of the endless wisdom of MNers where DH and I have both failed 
Painting a bedroom wall: the previous owners obviously painted it so many times the paint is now thick and cracking and peeling off. It looks awful - hence the reason for painting finally getting round to it after four years living here.
So, wise MNers, is there any way I can get rid of the cracks without having to spend the next month or so laboriously scraping it back to the plaster? Have thought of lining paper but not sure we could make a neat job of that and I'm a bit of a perfectionist. Sanding doesn't seem to work. Anything I could cover it with...?
Thank you in advance!