Perfect Decal Application. Mark Fit enables perfect decal applications. It softens decals so they can easily fit to uneven, rounded, and matt finish surfaces of plastic models while increasing adhesion. The bottle's cap comes with a convenient brush. 1 bottle contains 40ml. ?How to use? 1. Apply Mark Fit to the model where decal is applied. 2. Place decal on the model. 3. Position decal by an wetting finger. 4. Press decal down gently with a soft cloth or cotton swab until excess water is gone. 5. Apply Mark Fit over the decal, then press down gently with a soft cloth or cotton swab. 6. Allow the decal to completely dry.