You have a couple options to tackle that door frame restoration project.
Cat scratched up door frame repair.
Fill up the scratches with commercially available wood filler.
Once you have finished sanding wipe the area with a damp rag to remove sanding dust.
Once the filler has dried up lightly sand the area and wipe away all the dust.
Sand the repaired area with 220 grit sandpaper once the putty has dried.
Wipe excess stain on the rag.
I would try this approach first and if it does not work well or to your liking then go the replacement route.
Finish by applying varnish on the affected areas of the door.
Put a small amount of the gel stain on a rag then dab a little on a dry brush.
The binder helps to strengthen the area that was damaged the repair kit helps cover the scratch marks and the colorant restores the full luster of your couch.
2 set a scratching post within two feet of one of the doors where you applied.
I have cat claw damage to various items in my apartment but the ones i really want to focus on are the claw marks on the moldings around the doors into my bathroom and bedroom.
You may have to leave the door half open until the varnish finishes drying to avoid staining the door jamb.
Drag the brush lightly along one edge and quickly wipe it dry to see how the color looks.
I d say it would be easier on your wallet and effort to simply repair the scratches.
Looks like your cat has been very busy.
Wipe the scratched area with a rag dipped in thinner to keep the stain from looking blotchy.
You can either replace the casing on that side of the door frame or sand and fill it and sand again.
Spray a natural cat deterrent spray on the lower four feet of each door frame you need to protect against scratching.
Even if the cats scratched the door repeatedly there s very little chance that it would be damaged beyond repair.
If your cat has caused a larger area of damage you will need first to strengthen the area using a leather binder then fix the scratches using a leather repair kit and finally restore the color using a leather colorant kit.
First i would recommend to use a sanding sponge or fine steel wool to remove any gouges caused by the scratches.