Remove all removable hardware from the cabinets, such as handles, latches and hinges.
Mix a trisodium phosphate cleaner with water according to the product's packaging directions. Put on rubber gloves. Use the TSP solution to scrub the entire cabinet.
Remove the wax finish, if applicable, with an ammonia-based cleaner. Allow the cabinet to thoroughly dry from the cleaning.
Sand the cabinet with 80-grit sandpaper in the direction of the wood's grain. Repeat with 120-grit sandpaper. Continue sanding until the cabinet is very smooth.
Use a nylon-polyester brush to apply an oil-based brushing putty on cabinets made of open-grained wood. These include mahogany, oak, ash and hickory. The brushing putty works like primer, but it also fills in tiny gaps in the open-grained surface to provide a smoother finish.
Use an oil-based primer for cabinets made from woods that have a tight grain, such as maple. Dip a small roller into the primer and apply it to the cabinets. Brush the primer after finishing each section to smooth it out more evenly.
Allow the primer to dry for 24 hours. If you used brushing putty, sand the cabinet again with 120-grit sandpaper.