What I did instead is to paint the doors on the hall side in the same color (but higher sheen) as the walls on that side, and on the inside of the rooms that the doors were attached to I painted the doors the color of the trim in the room.
tabular alumina applications tabular alumina is the material of choice in unshaped and shaped high performance refractories used in a variety of industries steel foundry cement glass petrochemical ceramic and waste incineration other common non refractory applications include its use in kiln furniture and for metal filtration
Tabbing may be a simple piece of glass tape across the stringer/hull joint, or an integral structural part of the stringer. Some cores are structural, or active, and some are inactive, used primarily to provide a form for a structural fiberglass skin.