Penta Polyurethane Varnish Glossy (Quart)

General Surface Preparation

New Wood: Ensure that the wood is properly cured, and the surface is dry and cleaned free of all dirt, dust, grease, oil, wax, fungus / algae, resin, preservative salts and other debris and contaminants which may affect adhesion, drying, protective properties, or appearance of the coated surfaces.

Solvent Cleaning: Oil, grease and wax can normally be removed by using Penta Thinner 41 and changing wiping cloths often to assure removal. Some woods, such as Teak are very oily, and to ensure proper drying, the oil must be removed by wiping thoroughly several times with Thinner 41 or Lacquer Thinner, and then preferably sealed with Penta N.C. Sanding Sealer.
Preservative salts may be removed by cleaning with solvent or water, depending on the type.
Fill all holes, cracks, splits and crevices with an appropriate wood putty or filler. Oil-based putties or fillers should be used over wood sealed first with 1 coat of Penta P.U. Varnish Glossy. Sand the surface with the grain only. Use a medium grit paper at first, and progress to finer paper as the wood becomes smooth. Dust or vacuum completely. The surface may be dampened again to raise the grain. If this is done, the wood must be sanded again when dry.

Previously Varnished: Remove all loose, semi-adherent, peeling, blistering and cracking varnish, dirt, dust, grease, oil, wax, fungus/algae and other contaminants and sand to a featheredge where necessary, to obtain a clean, firm sound surface. Fill all surface defects as for new surfaces. Rub down smooth glossy surfaces to ensure good adhesion. If varnish is easily removed by scraping, or if more than 25% is removed, then it should be completely removed, by scraping and/or sanding, stripping with Penta Paint Stripper, or by means of a hot air blower.

Previously Painted Surfaces: Will also have to be completely stripped in a similar manner. When using Paint Stripper, apply it liberally and spread it around with a brush. Allow the old surface to blister (20-30 minutes). Do not allow the stripper to dry on. Use a scraper tool or putty knife to remove the residue. Furniture with several coats of finish may require several applications of Penta Paint Stripper to reach bare wood. Remove any residues with steel wool dipped in water, rinsing frequently. Wipe the entire surface with a clean dry cloth.
Allow to dry completely, solvent clean with Thinner 41 or Thinner 792 (Lacquer Thinner) to remove residual wax from the stripper, with frequent changes of wiping cloth. Finally sand.Treatment of Fungus Infected Areas: Treat fungus/algae infected areas with a solution of 1 part household bleach in 3 parts water. Rinse off thoroughly with clean water.

NB: Observe manufacturers precautions for using household bleach. Wear protective goggles, rubber gloves, boots and clothing to protect eyes and skin from splashes. The alkalinity of the bleach may cause discoloration of new wood. Therefore check first on test area.