How to Apply Marine Grade Varnish

Save

Marine varnish (spar varnish) protects wood from the effects of weather and wet environments. Wood that is finished bright (stained and varnished) is normally coated with several layers of varnish. The varnish dries clear and brings out the grain and natural beauty of the wood. The varnish layers form a hard shell that protects the wood from abrasion and impact damage. Suitable for use in exterior and marine applications, spar varnish is applied with simple techniques. Maintaining a good coat of varnish is a crucial part of wooden boat part maintenance.

Things You'll Need

  • 120-grit sandpaper
  • Sanding sealer
  • Marine varnish
  • Fine-bristle paintbrush
  • Steel wool
  • Lacquer thinner
  • Painter's rags
  • Sand the area to be varnished with 120-grit sandpaper. Sand any rough areas out and leave a uniform finish on the work. This will open the grain to accept stain and give the work "tooth" for the sealer to bond to. Stain the wood at this point if desired. Allow the stain to dry fully.

  • Apply sanding sealer with a paintbrush. Coat the entire work surface. The sealer soaks into the wood and forms a bond with the subsequent layers of varnish. Allow the sealer to dry fully.

  • Rub the work down with the steel wool. The sanding sealer will raise the grain of the wood and lock it into place. Sand the work until it feels smooth to the touch and uniform. Remove all sanding dust by wiping the work with a rag.

  • Paint on a coat of varnish. Coat the work completely but not so heavily that it sags or runs. Allow the varnish to dry fully.

  • Rub the work down with a fresh piece of steel wool. Do not remove the sanding dust.

  • Continue applying coats and rubbing in between until the hollows created by the grain are all filled in, or until you get three coats of varnish. Do not rub the last layer of varnish after it dries.

  • Rinse all buckets and brushes well with lacquer thinner. Varnish that is allowed to dry in a brush will ruin it.

Tips & Warnings

  • Thin varnish can substitute for sanding sealer. Add small amounts of thinner to some varnish until it is thin enough to be soaked up by the wood. This will protect and bond with the wood the same as the sanding sealer.

References

  • Capt. TJ Hinton; commercial boat captain; Gulf Coast, Miss.
  • Photo Credit Hemera Technologies/AbleStock.com/Getty Images
Promoted By Zergnet

Comments

You May Also Like

  • Spar Varnish Vs. Spar Urethane

    Spar varnish and spar urethane are two very different compounds. The main difference between the two is spar varnish will eventually chip...

  • About Marine Varnish

    Marine or spar varnish is a protective coating for wood that consists of different resins in tung oil, according to WoodCentral.com. It...

  • How to Choose a Wood Varnish

    Varnish protects wood from scratches and stains with a polyurethane coating. It's typically used over stains but can be used alone on...

  • How to Apply Varnish

    Varnishes protect wood from scratches and stains with a durable coating. These instructions apply specifically to oil-based varnishes, which are easiest to...

  • How to Sand Spar Urethane

    Spar urethane is a clear waterproof wood finish. Originally formulated for use on boats, the spar is a part of the sail...

  • How to Seal Marine Plywood

    Marine plywood is a type of wood specifically formulated for use in moist or wet areas. This plywood is formulated to resist...

  • How to Apply UV Protection Varnish on an Exterior Wood Door

    Sunlight is perhaps the most damaging element to exterior wood. Exterior wood doors, even if stained, often bear the brunt of ultraviolet...

  • How to Remove Spar Varnish From a Paintbrush

    Spar varnish, also called marine varnish, is a tough formula used for boats and exterior jobs. The sticky substance can ruin a...

  • Epifanes Clear Varnish Application Directions

    Among wooden boat and yacht owners, Epifanes Clear Varnish is widely considered the gold standard for protective and appearance-enhancing varnish. It provides...

  • How to Apply Spar Varnish

    Spar varnish is a type of varnish that can be used to help protect multiple types of surfaces. This usually includes multiple...

  • How to Use Brushing Lacquer

    The finished look of lacquer is stunning; however, it can be very tricky to work with. Several issues can occur. Blushing is...

Related Searches

Check It Out

How To Travel For Free With Reward Points

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!