Fabric paint or acrylic paint are probably still your best options for painting a backpack. However, you may want to consider a better quality brand of paint if it smudges right off after drying.
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Whether you're looking to save on supply spend where you can, or you just want a bag that no one else is toting around this school year, Tulip Fabric Paint is a fab way to revamp last year's tired old backpack or give a simple one fun personality in your own awesome style.
Sealing the paint with heat, such as a hot iron, ensures that the paint lasts long and prevents paint from chipping in the wash. This is important to do for acrylic paint and any other commercial fabric paint.
Fabric paint or acrylic paint are probably still your best options for painting a backpack. However, you may want to consider a better quality brand of paint if it smudges right off after drying. Some other things you might want to consider are: Wash the fabric first before painting, if possible.