Methods of making honeycomb bodies having inorganic filtration deposits

A method for applying a surface treatment to a plugged honeycomb body comprising porous walls, the method comprising:

• atomizing particles of an inorganic material into liquid-particulate-binder-adhesion promoter droplets comprised of an aqueous vehicle, an alkylalkoxysilane binder, an adhesion promoter, and the particles, the adhesion promoter comprising γ-Glycidoxypropyl) trimethoxysilane, (3-Glycidoxybutyl)trimethoxysilane, (3-Glycidoxyethyl)trimethoxysilane, or 3-GlycidoxyHexadecyltrimethoxysilane;
• evaporating substantially all of the aqueous vehicle from the droplets to form agglomerates comprised of the particles and the binder material;
• depositing the agglomerates onto the porous walls of the plugged honeycomb body;
• and
• wherein the deposited agglomerates are disposed on, or in, or both on and in, the porous walls.