Kathy: I have good news and bad news. The good news is that it is possible to remove the cement, the bad news is that it is a lot of work. We went through this in a kitchen this year. After experimenting with different devices, including a heat gun ( ver-r-r-y slow ) ,and sanding, I found a carbide edged scraper in the tool section of the local Lowe's. It had a knob near the blade end of the scraper which allowed you to place the other hand over the blade and apply extra pressure. It really went quite well. Finished up with a medium belt on a belt sander; followed by drywall topping compound to fill in the small inevitable nicks. This was only worth it because the wall was plastered and the surface quite hard, and I wanted to retain the plaster. I think if it had been drywall, I just would have ripped it off and started from scratch.