To get the best results, ensure surfaces to be varnished are sound, clean and dry. Special precautions should be taken during surface preparation of pre-1960s paint surfaces over wood and metal as they may contain harmful lead.
Remove all loose and defective coatings (e.g. varnishes and woodstains). Paint should be stripped back to bare wood.
Thoroughly rub down all new, bare and previously stained or varnished surfaces that are in good condition along the grain of the wood to provide a key.
Remove dust with a damp, lint free cloth. New or bare wood should be sealed with a coat of Dulux Clear Varnish Gloss, thinned with 1 part white spirit to 10 parts varnish, even when finishing with matt or satin finish.