To get the best results, ensure surfaces to be painted are sound, clean and dry (new surfaces particularly must be fully dry) and free from all defective or poorly adhering material such as dirt, grease and wax. New or bare surfaces should be primed with an appropriate Dulux primer. Thoroughly rub down previously painted surfaces, using ‘wet flatting’ methods where possible, then wipe off with a damp, lint free cloth. Special precautions should be taken during surface preparation of pre-1960s paint surfaces over wood and metal as they may contain harmful lead. Treat any knots in wood with an appropriate knotting solution. Any surface defects should be filled with an appropriate Polycell Polyfilla.