Things You'll Need
Mylar is a trade name for a type of polyester film made by DuPont. It is used in a variety of craft projects due to the protective properties it can provide. Among these properties is a resistance to a variety of chemicals. Many types of paints and inks will not be able to dry properly onto Mylar and will run. Acrylic paints can be used on wet-media Mylar to allow the paint to stick properly.
Tape the Mylar to a flat surface. This will prevent it from crinkling or shifting during painting.
Paint the surface of the Mylar using acrylic paint.
Allow the Mylar to sit for 72 hours. This ensures the acrylic paint is fully cured.
Remove the tape. The paint will now be fully adhered to the Mylar.
Make sure the Mylar you are painting on is marked as wet media Mylar. The acrylic paint might not bond properly with other types of Mylar.
The acrylic paint will usually be dry to the touch after about an hour. This does not mean the acrylic paint is fully cured. Wait the full 72 hours to ensure the acrylic paint is properly bonded to the surface of the Mylar.