Do I need yacht varnish for internal wood?

[RogerFoxTerrier]

I've gone for the water-based Ronseal in the end, and so far am very impressed. I chose walnut and it's a very close match to the existing wood which sanded to a dull finish, then re-coated.

 

[Airscrew]

The trouble with traditional varnish is that, if it gets damaged, and damp underneath, it has to be stripped back to bare wood before starting again. For a tougher, easy to repair finish, try le Tonkinois. It survived the best part of 10 years on the stairs with a houseful of kids who became teenagers in Chateau Stemar

+1 for Le Tonkinois. Amazing stuff.