What you need to do is first prime your plastic surface with a primer intended for that type of surface and allow this coat of primer to dry completely. Then you can paint on the primer with your acrylic paint, let it dry and then varnish it with an acrylic paint finish.
Use paints specifically designed to adhere to plastic. There are several available on the market such as Krylon Fusion for Plastic®, Valspar® Plastic Spray Paint and Rust-Oleum Specialty Paint For Plastic Spray. If you are using regular spray paint your item will need to be primed.
A clear acrylic sealer adds an extra layer of protection to your freshly painted plastic surface. You don’t have to use the sealer, but it can help the results be more permanent, especially if you’re painting an outdoor item. You can get a spray sealer to make the job easier.
Best Overall: Krylon Fusion All-In-One Spray Paint
Since it also protects against rust, it can be your MVP when painting plastic furniture or other items with metal Components.
Paints require a clear coat to protect against chips and scratches. Clear varnish seals and protects paintwork on plastic, metal and wood. There are several brands and varieties of clear coat on the market today, and one of those varieties is a spray.
If you’re using acrylic paint on plastic, a clear acrylic sealer can help complete the job by providing more protection and ensuring the paint stays where you put it. A spray sealer is more convenient and used in a similar way to primer and spray paint.
Does acrylic paint stick to plastic? No, unless the plastic has been prepared by first sanding it and then spraying it on with a primer. Because plastic is smooth and non-porous, and acrylic paint has a similar consistency after drying, paint cannot adhere to plastic.
Polymer Varnish is designed as a top coat for acrylic paints, providing a removable protective layer to the relatively soft acrylic paint layer.
Fortunately, if you have plastic wood finishes in your home, you don’t have to give up staining them just yet. Special polyurethane finishes can be applied directly to plastic wood and offer a translucent color that mimics real wood stain.
Polyurethanes can be applied as high-solids or powder coatings without loss of performance. As a result, polyurethanes are now the market leader for coating metal and plastic substrates in numerous high-quality and high-visibility applications.
You can use acrylic paint on most types of plastic. However, you must choose the right color for your project. You may also need to properly prepare the paint and seal it onto the surface, mostly by sanding and priming the plastic before applying the paint.
Gloss standard exterior paint is a suitable finish for plastic when used in conjunction with a suitable primer and primer. Either acrylic or oil based gloss can be used and both are available in a wide range of colours.
However, nail polish in general is not considered a safe permanent color on plastic. It’s quite volatile and not meant to last long.