Colorful Dog Polish Pens With a patented, water-based formula, Pawdicure Polish Pens are non-toxic, easy to apply, and guaranteed to make any dog look fabulous! Only one layer is needed for great looking nails! Water based formula is completely non-toxic. Easily removable with non-acetone nail polish remover. For best results on dark nails, we recommend applying a base coat of white before adding a color. Directions For Use: Nail Polish must flow from pen nib for proper applications. First Use: Shake pen well, remove cap, press nib of pen straight down on a protected surface until nib depresses slightly into body of the pen. Pen is ready for use when nib is all wet with polish (About a minute). Subsequent Use: Shake and depress nib to freshen with polish before use. To Remove: Use non-acetone polish remover and rinse off. Buffing block will also work. AVAILABLE COLORS: Black, Blue, Pink, Purple, Red, White.