A method of coating a surface with an antimicrobial coating comprises spray-coating a mixture of 3-aminopropylsilane triol and triethanolamine on the surface. The coating is capable of reducing the number of Murine norovirus and E. Coli inoculated on the dried coating. In various examples, the method further comprises the step of spray-coating a mixture of peroxotitanium acid and peroxo-modified anatase sol on the surface. The compositions may be electrostatically sprayed on the surface, and in certain examples, a mixture of silanol and triethanolamine is spray-coated on the surface followed by an aqueous mixture of peroxotitanium acid and peroxo-modified anatase sol.
