Often, furniture is made of a fairly inexpensive wood with a very thin layer of decorative wood glued to the surface of it. The glue used can sometimes fail, leaving a bubble in the veneer. If the furniture is old, you may use heat to repair this problem. If the furniture piece is newer, heat will not work due to the use of non-heat-reactive glues during the manufacturing process.
For older furniture, cut a small slit in the bubble with the Exact-O knife in the direction of the grain.
Heat the bubble area with a hair dryer or place several pieces of paper over the bubble and iron the paper over the bubble to heat the area. Keep the heat as concentrated in as small an area as possible to prevent a large area of glue from softening.
Roll over the bubble area immediately with the veneer roller or wallpaper seam-roller as soon as the glue is softened.
For newer furniture, cut an "X" shape into the bubble with the Exact-O knife, keeping the cuts in alignment with the wood grain as much as possible. (If you have a cut left over from attempting steps one through three without success, incorporate the first cut into the "X" by just making one other cut.)
Use the tip of the Exact-O knife to scrape out as much glue as possible from under your cuts.
Use the tip of the knife to apply wood glue to the underside of the veneer under the flaps made by the cuts.
Flatten the area by rolling over it with the veneer roller or the wallpaper seam-roller.
Wipe any excess glue off with a damp rag.
Lay waxed paper over the area. On top of that, place a wood block weighed down with heavy books to keep the area under pressure for several hours until the glue dries.