Swamp Yankee is correct. I prep the dipping area by cleaning it with 91% Isopropyl to remove any film. After letting it dry thoroughly, I apply a thin base coat of white. You need a white base coat for all colors, especially florescents.
If I want a white crown dip, I leave the paint a tad thicker or just use 2 thin coats. Then use Bohning glue to adhere the feathers and nock. Never had a problem with feathers coming off. Also, the vinyl paint can be removed pretty easily for arrow repair or re-dipping.