Can I apply fire resistant paint directly onto a varnished or French Polished door frame or do I have to apply Zinsser B.I.N first so that the fire resistant paint sticks to the zinsser first? Thank you!!
After cleaning and preparation of these surfaces as per the manufacturers instructions you could apply either Envirograf Door Upgrade Paint System or Envirograf Door Upgrade Varnish System using the primer included in the kits.