For oil painting, would a mixture of linseed oil and damar varnish

How to Varnish a Painting in Oil, Water-Mixable Oil or Acrylic

Dammar varnish is a pale yellow varnish which dries to a high gloss for use on oil and alkyd paintings It tends to darken with ageing and is removable

Winsor & Newton Professional Dammar Varnish, 250ml (8.4-oz) Bottle

Why do artists use linseed oil in their oil paintings? - Quora

Why is formaldehyde used in paints and varnishes? - Quora

Grumbacher Damar Varnish

Oil Paint on raw, untreated Wood (Interior and Exterior)

Oil Mediums / Varnish / Maroger / Damar / Liquin / Acrylic vs Oil

How to use linseed oil when painting - Quora

Any artists here who deliberately don't varnish their paintings? Do the paintings get dull over time, or are they harder to clean? And are there other ways to preserve paintings without varnish?

Should you use varnish or oil to bring out the natural colour in a piece of wood? - Quora