Certain open-grain or porous surfaces (such as wood, fabric, paper and concrete) allow air to flow through, causing additional opportunity for bubbles to form in the Glaze Coat. If you are using Glaze Coat on a porous surface, apply a thin SEAL COAT first to seal the air passages. To do this, apply a thin layer of mixed Glaze Coat or a water-based polyurethane over the surface. Allow the seal coat to cure for 4-5 hours before applying the final FLOOD COAT (up to 1/8” thick).
NOTE: If the seal coat has been allowed to fully cure (72 hours), lightly sand with 400 – 600 grit sandpaper, then dampen a lint free cloth with acetone or alcohol (NO tack cloths!) and wipe the entire surface to remove the sanded particles. Allow the acetone/alcohol to fully dry for 30 - 60 minutes before pouring the final flood coat.
(TIP: If any bubbles do form in the final flood coat, you can always use a small butane torch, heat gun or blow dryer to lightly hit those bubbles and make them disappear!)