This Johnstones Trade Durable QD Polyurethane Varnish is a traditional-style varnish with a tough and durable finish for use on bare timber as well as previously treated timber too. This Johnstones Trade Durable QD Polyurethane Varnish is perfect for use on doors, window frames, furniture, and smooth planed interior timber too. This varnish is also solvent-based too.