When it comes to functional materials, plexiglass is one of the most versatile around. It is shatter resistant, easy to cut and shape, highly transparent, and comes in a wide range of colours. That is why you see it used in everything from homes to commercial spaces.
More recently, I have seen a lot of people asking things like “can you paint plexiglass” or “how to paint on plexiglass with acrylic paint”. The short answer is yes, you absolutely can.
I have recently painted some plexiglass myself and the outcome was better than I expected. Once you get the prep right, it becomes a really enjoyable surface to work on. It sits somewhere between glass and a traditional canvas.
So whether you are painting on plexiglass for a DIY project or experimenting with painting on an acrylic sheet as your canvas, here is what I have learned along the way.
Painting on Plexiglass: Materials You Will Need
Like any DIY project, preparation makes all the difference. Here are the essentials you will want ready before you start
• Fine grained sandpaper
• Soft sponge
• Soapy water
• Lint free cloths
• Acrylic primer
• Acrylic paint
• Brushes or rollers if needed
• Masking tape if needed
• Waterproof sealant if needed
• Your plexiglass or acrylic sheet
• Protective sheets or newspaper
• A well ventilated workspace
From experience, if you are choosing between paint types, acrylic paint on plexiglass is the safest option. Other paints do not bond as well and can cause issues later.
Painting on Plexiglass: A Step-by-Step Guide
Have all the necessary materials on hand? Let us get started on our acrylic painting project!
#1 – Preparing the Surface
Custom plexiglass sheets are incredibly smooth which makes it a pretty hard canvas to work on. This is why the very first step requires us to prepare the surface for the paint by roughening it up!
Simply use your fine-grained sandpaper and sand down the surface lightly. Make sure you take the time to cover the entire surface and that you do not miss a spot – else paint might not adhere well on parts of your canvas.
The next step of preparing the surface involves cleaning it up! Duh right? You would not want to work on a dirty or greasy surface. Make sure you clean AFTER sanding if you do not want small particles trapped under your paint.
How to clean it up? Simply soak your soft sponge or lint-free cloth depending on what you have available in soapy water and start wiping it down. Make sure to rinse off the suds with water. Once clean, use a dry lint-free cloth to wipe off excess moisture.
To make sure it’s extra dry you can leave it out to dry for a few hours before the next step. Alternatively, if it is small enough, you can dry it in an oven for 5-10 minutes at a low temperature (under 40 degrees Celsius).
#2 – Priming the Surface
Priming helps to create a good adhesive surface for the paint, so make sure you prime it first!
If you are using a spray, so make sure you shake it well before spraying it on evenly at the recommended spraying distance. If you are using a liquid primer, make sure to evenly spread it across the surface.
Cover the surface in one coat and let it dry. Differs from brand to brand – check the recommended drying time for the brand of primer you are using.
#3 – Start Painting on the Acrylic Sheet
And now you have it – a canvas that is ready to paint on!
To paint a full solid colour, simply layer on the acrylic paint (spray or liquid) across the surface evenly. If you are working with a transparent polycarbonate sheet, you might need to go over it with several coats, probably 3 – 4 coats.
If you are painting on parts of it, simply use your brush, roller, or spray to paint on your designs. Again, you might need to go over with a few coats.
Make sure each layer dries before going on with the next to avoid smudging.
And you are almost done!
#4 – Water Proofing & Sealing Protection (optional)
The last step is optional depending on whether you want to ensure durability for your “masterpiece”.
If you are putting it outdoors or exposing it to moist environments, this is a must do!
Like priming and painting, you will need to apply at least one layer of the commercial sealant over your artwork. This helps to create a barrier between the paint and the environment, protecting it and keeping it safe!
Simple tips for painting on Plexiglass:
Additionally, here are some useful tips you can take note of while trying out your painting on an acrylic project:
- Avoid solvent-based paints which can eat away at acrylic – water-based paints are good
- Use masking tape for perfectly straight lines
- Drying time can differ depending on the paint used
- For a glossy smooth finish, use clear polyurethane-based paint as a sealant
Final Thoughts
If you are new to painting on plexiglass, it might feel a bit unfamiliar at first. Once you understand the preparation process, it becomes much easier to work with.
From my experience, the biggest difference between a finish that lasts and one that fails comes down to surface prep and patience.
Get those right and painting on plexiglass or any acrylic sheet becomes a really flexible and creative option for all sorts of projects.
