– superficial scratches –
If your furniture or flooring are just slightly scratched and lines are not deep into wood fiber, a solution of olive oil and lemon juice will do wonders.
– deep scratches –
If the wood is deteriorated, you need something to fill the hole and to standardize the color.
The best natural remedy is to rub the scratch with an almond or walnut core, or with a waxy pencil or eyeliner.
If the wood has a darker color, you can try to paint the problem area with black tea bags or with coffee grounds.
Shoe cream can be a solution to a nasty scratch on the varnished wood table or for the livingroom shelf.