before using zinsser allcoat interior solvent based paint
Surfaces should be clean, dry, sounds and free of dust, dirt, excessive chalky material, grime, grease, oil, wax, mildew, wallpaper, adhesive or any contamination that may interfere with adhesion.
If unsure, always wash surface with a household ammonia and water solution, appropriate cleaning solution, or solvent (Dot not use tri sodium phosphate based cleaners). Remove any unsoundly adhered coatings.
Sand any remaining paint film edges smooth with the surface,
Attempt to remove existing stains by washing, sanding, scraping etc.
Remove interior mildew with an interior mildew cleaner.
Countersink exposed nail heads, spot-prime and fill.
Remove rust and wipe metal with a cloth dampened in alcohol.
Clean new galvanised metal with methalated spirit with a final rinse in vinegar to remove oils.
Spot prime knots and sap streaks with Zinsser B-I-N primer-sealer