Cutting And Trimming Styrofoam

• 1). Rub an old wax candle along the blade of a serrated knife, craft knife or electric carving knife. This will allow the blade of your cutting knife to slide easily into and through the Styrofoam.
  
  
• 2). Measure and mark your cutting line on the foam with a permanent marking pen or by pressing an indentation into the foam with a ball-point pen.
  
  
• 3). Cut and trim along the marked line with a waxed cutting blade. Use small strokes and short sawing motions. Do not force the blades, this may cause the Styrofoam to crack and break.
  
  

Sanding And Smoothing Styrofoam

• 1). Cut or trim your Styrofoam project pieces.
  
  
• 2). Cut a 2-inch square scrap piece of Styrofoam. Rub the cut edge of the scrap piece against the cut edges of the Styrofoam project pieces. This will sand and smooth the rough-cut edges.
  
  
• 3). Rub the scrap piece of Styrofoam against sharp corner edges of the cut Styrofoam project pieces to round, blend, taper and shape them.