as for your table, like Melanie said, many people wax their tables to get a smoother surface. Be a bit cautious so you don't use a wax with silicone. Silicone is very fine and can get into the pores of the wood and wreak havoc on any finish you attempt. Johnson's paste wax is one of the more common ones here in the states, I don't know about the rest of the world.
another option that some people use is to make an auxiliary table that has a more slippery surface. Melamine is a common material to use, it is the plastic layer that often gets bonded to particle board to make shelves, countertops and other store bought furniture.