Replacing a Rotted Windowsill

1. Cut away the soft or rotted wood with a knife or wood chisel.
   
   
2. Fill the damaged area with epoxy or polyester wood filler.
   
   
3. Use a putty knife or small bread knife to shape the wood filler so that it matches the contours of the sill.
   
   
4. Allow the filler to set and sand it smooth.
   
   
5. Apply wood primer and paint to the repaired area.