You can save and restore important pieces, like window ledges, from rotten wood by using a wood hardener ,PC-Petrifier Wood Hardener, and bondo.
The PC Products 16 oz. PC-Petrifier Wood Hardener can be used to harden damaged and rotted wood inside and outside of your home. Pour onto soft rotted wood to help restore. It is pre-mixed formula is environmentally safe and ready-to-use.
• Helps harden damaged and rotted wood
• For non-structural applications – window frames, sills, doors and wooden trim
• Water-based formula is environmentally friendly
• Safe for indoor and outdoor use
• Paintable
• Shrink resistant
• Pre-mixed and ready to use
• Can be sprayed or poured
• Dries in 12 – 24 hours
• After cutting, rebuild parts epoxy or Bondo Wood Rot
Inspect the wood and if 50% or more is salvageable then use the restoration products.
Wood must be DRY so the fortifier soaks in.
Drill holes in vertical wood at a downward angle so it does not drain out.
Apply epoxy, Bondo and push it into cracks and holes.
Shape and sand it smooth.
Stain or Paint to taste.