Can you patch a hole in an interior door?
Apply the plastic wood or auto body filler on top of the insulation foam. Using a craft stick or putty knife, smooth the filler off to be level with the door. The filler should be applied generously around the hole — even on the surface of the door.
How big of a hole can you fill with wood filler?
Cellulose Wood Putty
Accepts stain or paint just like real wood. Dries hard. Is not suitable for holes larger than about 3/8-inch.
What can I use instead of wood filler?
To make a versatile wood filler for free, just grab a paper plate and combine Elmer’s or any other wood glue with sawdust.