Polycarbonate is a thermoplastic polymer that is durable yet easily molded and thermoformed. These traits allow the plastic to be used in a variety of products, including eyeglasses and electronics. Polycarbonate sheets also are used in construction, and may be referred to by trademarked names such as Lexan, Makrolon or Makroclear. You can add a painted finish to a polycarbonate sheet if you properly prepare it. If you do not properly condition polycarbonate for adhesion, finish failure will prove unavoidable.
Things You'll Need
- Water-based degreasing soap
- Nylon sponge
- Power sander
- 100-grit sandpaper
- Painter's taper
- Canvas drop cloths
- Acrylic spray primer
- Acrylic spray enamel
Wash the polycarbonate sheet with a water-based soap, using a nylon sponge. Thoroughly rinse all residue from the polycarbonate using wet rags, or the base primer will not adhere to it. Let the sheet dry for two hours.
Roughen the polycarbonate sheet to enhance its adhesive qualities. Sand the polycarbonate with 100-grit sandpaper and a power sander until it feels rough to your fingers. Take your time and be thorough, or the bonding primer will eventually flake off.
Protect surfaces next to the polycarbonate sheet with painter's tape. Cover the floor beneath the polycarbonate with drop cloths.
Apply acrylic bonding spray primer to the polycarbonate sheet. Maintain an 8-inch space between the polycarbonate and spray tip to prevent sagging. Let the sheet dry for at least two hours.
Apply acrylic spray enamel to the polycarbonate sheet. Maintain an 8-inch space between the polycarbonate and spray tip to prevent sagging. Let the sheet dry for at least two hours.
Tips & Warnings
- Never try to paint directly over bare polycarbonate sheets, or peeling will ensue. Likewise, never try to prime over unsanded polycarbonate, or flaking will result.
- Latex paint won't hold up on a polycarbonate sheet.
- Do not undervalue the cleaning process, or the polycarbonate sheet may shed the bonding primer.
How to Apply Semi-Gloss Paint
Semi-gloss paint is different than a matte paint in that semi-gloss paint tends to go on runnier. It can seem streaky to...
How to Glue a Polycarbonate Sheet
Polycarbonate is a clear, colorless plastic often used as a replacement for glass. There are two ways to glue polycarbonate sheets: using...
How to Paint a Polycarbonate Roof
Polycarbonate is a durable plastic used in a variety of products, including electronics, automotive components and construction. Like other plastic surfaces, polycarbonate...
How to Install Corrugated Polycarbonate Sheets
Corrugated polycarbonate sheeting keeps outside weather from coming in a building while still allowing natural light to flow into the building. The...