It all depends on the type of adhesive used. If it is the old hide glue, then a scraper should lift most of the veneer, and heat from a heat gun or household iron will loosen the rest. Newer adhesives may also be loosened by heat, and/or steam, or white vinegar, and vigorous scraping and sanding. Don't expect the surface to be in any kind of usable condition under the veneer.
Good luck!
Posts: 261 | Location: VA, AL, GA | Registered: 23 October 2007
The wood under the veneer is called secondary wood---you will need to replace the veneer is you remove it. And removing it---the veneer has been glued on---is most easily done by sanding it off. That will be prohibitively expensive in sandpaper and mess.