before using zinsser interior water based ALLCoat
Surfaces should be clean, dry, sound 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 (Do 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, such as Zinsser Mould Killer & Remover.
Countersink exposed nail heads, spot-prime and fill.
Wire brush rusty areas.
Clean new galvanized metal with methylated spirit to remove oils.
Spot prime knots and sap streaks with Zinsser B-I-N® Primer Sealer before priming full surface with AllCoat