How To Spray Varnish On To Sheet Metal

Acrylic latex provides the best coverage on prepainted surfaces.

How to spray varnish on to sheet metal.

Apply a wire brush and scraper combo to the metal first to remove all loose paint and rust or to scuff up the surface of aluminum or galvanized metal. Be sure to wait at least 2 hours before applying an additional coat. Hold the spray paint can 12 to 24 inches 30 4 to 60 9 cm from the surface. White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent.

Once again read your product s instructions shake the can for as long as directed and use even continuous strokes. The acid in the vinegar will act to etch the metal and help the paint adhere. Shake the can vigorously for 45 to 60 seconds and spray onto a cardboard box or the bottom. After removing loose paint first apply an orbital sander using 60 grit sandpaper working up to 100 grit sandpaper for a smooth finish.

On older galvanized metal surfaces where the zinc coating has begun breaking down known as white rust use a wire brush or fine sandpaper to remove the chalky film before cleaning it. Let the vinegar air dry and then choose. Keep your coats thin for a smooth even finish. Once the metal has dried dampen a cloth with white vinegar and wipe the surface down.

The paint should adhere to the prepainted metal surface. Wash the metal thoroughly with hot soapy water. Once you ve roughened the surface wipe the sheet metal with white vinegar and a soft clean cloth. Apply latex paint to the surface.

For best results keep the can parallel to the sheet metal surface and spray in a back and forth motion over the surface. The acidity of the vinegar will react with the metal treating the surface to promote paint adhesion. Apply spray paint to the sheet metal. The acidity of the vinegar will further abrade the metal.

Rinse the metal with a weak solution of water and ammonia and allow it to dry. Use a brush roller or spray can depending on your preference or the size and shape of the metal object. Remove any handles or other attachments from the metal. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface.

Spray in a quick smooth and even pattern until the surface is covered.