Staining Guides

Staining Wood Grain Fiberglass Doors

Staining Wood Grain Fiberglass Doors

Step 1: Surface Preparation (Do not sand grained fiberglass!)

  1. Lay jamb horizontally on saw horses or a table.
  2. Remove all hardware and mask off anything you don’t want stained, such as the glass insert.
  3. Wipe the door with mineral spirits to clean any dust or residue from the surface. Allow the door surface to dry completely before applying stain.

Step 2: Apply the Stain to the Door

Stain color options

You can control the shade (lighter or darker) of each of the 7 stain colors during application by varying the amount of stain applied.

First coat

  1. After all the stain is brushed evenly, you may add finishing touches by using a small 1” to 2” brush or cotton swabs.
  2. Starting at the center of the door, stain one to two panels at a time. Apply stain with a 2½” soft bristle brush, or a rag. Apply enough stain to fill the door grain. (Refer to the door staining diagram.)
  3. With a clean, lint-free, 24” x 24” cloth, softly wipe the surface until you reach your desired tone.TIP: When the rag becomes saturated with stain, re-fold to work with a less saturated section. Be sure to use the same rag for the whole door.

Second Coat (if desired)

Allow the jamb to dry for at least 48 hrs between coats. Repeat as above.

Step 3: Protective Top Coat

Apply a polyurethane top coat with UV inhibitors like ZAR™ Exterior polyurethane, Wood Kote® Flagship UV, or Minwax® Fast Drying Polyurethane for exterior applications

  1. Apply two or three coats of finish, allowing at least 24 hours of drying time between each application.
  2. After the stain has completely dried (48 hours), mix the top coat well and apply evenly, using a clean dry 2″ soft bristle brush or 3″ foam brush. Be sure to stop when the grain changes direction.

Normal Maintenance

Even a well-finished fiberglass door will be affected by exposure and weathering from the sun, moisture, and air pollutants. It is considered normal maintenance to re-apply the topcoat approximately every two years.

Due to the variability in finishing materials, application conditions, and techniques, all of which are beyond the control of Plastpro, Plastpro cannot be responsible for the performance of field applied finishes or individual application techniques.

*Staining instructions are for Oil-Based, Premium Quality Wood Stains, or similar products designed for use on a fiberglass surface. Please note the instructions indicated are specific to the Zar brand stain included in our stain kit. Please reference the stain manufacturer’s instructions before applying any stain.

Plastpro_Staining_Guide_Woodgrain_92519_rev2

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