Penta Gloss Paint Pastel Green (Quart)

General Surface Preparation

New and unpainted: Ensure that surfaces are dry and cleaned free of all dirt, dust, grease, oil, wax, form oils, parting compounds, fungal and algal growth, and other debris and contaminants.

Wood: New wood must be cured, dry and cleaned free of any dirt, oil, grease, exuded resin, soluble salts arising from preservative treatment etc. Fill all cracks, holes, crevices etc. with an appropriate wood putty or filler. Oil-based putties and fillers should not be used over primed wood.

Iron and Steel: For normal exposure remove rust and millscale by hand tool cleaning (SSPC-SP2-82) or power tool cleaning (SSPC-SP3-82) to Swedish Standard St-2. Remove oil, grease etc. by solvent cleaning with Penta Thinner 41 to SSPC-SP1-82. For severe exposure (e.g. marine), blast clean to commercial standard, SSPC-SP6-82.

Aluminium: Thoroughly degrease with Penta Thinner 41.

New Galvanize: Thoroughly degrease to remove oils, grease, waxes etc. by solvent cleaning with Thinner 41 in accordance with SSPC-SP1-82. Remove non-oily soils and dirt by water-washing with scrubbing, using a nylon brush/broom. Partially soluble contaminants and clear water-sensitive chromate coatings may be removed by cleaning with a solution of ammonia or acetic acid, following by thorough rinsing with clean water. Sanding or brush sand blasting may be used to remove silicate and chromate treatments and also to roughen the surface, which is important for ensuring good adhesion.

Weathered Galvanize: Weathering of galvanize for at least 6 months will remove oils and many surface treatments, and provide a finely etched surface suitable for painting. Weathering is unpredictable, and the surface must therefore be thoroughly examined to ensure that the oxidized surface layer is uniform and tightly adherent. Scrub with water and a nylon brush to remove non-oily dirt and any water-soluble zinc salts, and loose, powdery white rust. Cleaning with a dilute solution of ammonia or acetic-acid may also be used to remove partially soluble zinc salts, but this must be followed by very thorough rinsing with clean water. Clean if necessary with Thinner 41, to remove any oily contaminants.

Rusted Galvanize: Derust by mopping the whole surface with Deruster 127 diluted 1:3 with water. Allow to derust for 2 to 3 minutes before rinsing off thoroughly, by hosing down with water. Do not allow Deruster127 to dry off.

Masonry: New cement-based masonry (e.g. concrete, cement-rendering, cement mortar pointing) is not an ideal substrate for oil/alkyd based paints, which are prone to alkali attack and disruption by efflorescence. Thorough curing and drying out is even more critical than for emulsion paints. Allow cement-rendered surface and pointing to cure and dry out for 6 weeks and poured concrete for 12 weeks. Fill surface defects (holes, cracks, crevices, etc.) with an appropriate masonry filler. Level any surface projections and mortar spatters by grinding stoning or scraping. Rake mortar joints cleans. Rub down with rubbing stone/brick to remove loose sand particles.

Fibre-Building Boards: (Softboard, Medium board, Hardboard) Sanding is not usually necessary and can damage glossy surfaced hardboards. Fill nail holes and other surface defects with appropriate putty or filler. Oil-based putties and fillers should be used only on primed or sealed surfaces, and water-based on either.

Chipboard: Single layer, open-surface chipboards may require sanding and overall filling with oil or water-based fillers if a high standard of finish is required, but the surface must be primed first with an oil-based primer such as Penta Wood Primer Undercoat.

Gypsum Plaster: New plaster must be allowed to dry out thoroughly. Lime plaster required 30-60 days and other more popular plasters somewhat less. No paint or sealer should be applied if the moisture content exceeds 8%. Plaster nibs should be scraped and sanded smooth. Cracks should be spackled and smoothed.

Gypsum Wallboard: Ensure all surfaces are dry and cleaned free of dirt, dust etc. Do not use linseed oil putty, glazing, patching pencil, caulking compounds or masking tape on surfaces to be painted.

Previously painted: Remove all loose, flaking, peeling and semi-adherent paint, sanding to a feather-edge where necessary to obtain a clean, firm, sound surface. Fill surface defects as for new surfaces. Rub down smooth glossy surfaces. Rub down smooth, glossy surfaces to ensure good adhesion.