Coating compositions having peptidic antimicrobial additives and antimicrobial additives of other configurations

A surface coating composition, comprising:

• at least one cysteine-free peptidic antimicrobial agent selected from the group consisting of SEQ ID Nos. 173 and 180-184 and variants of SEQ ID Nos. 173 and 180-184 having one or more functionally equivalent amino acids substituted therein, said substituted amino acids having no more than a +/−2 difference in hydropathic value of the Kyte-Doolittle scale compared to the hydropathic value of the Kyte-Doolittle scale of amino acids in SEQ ID Nos. 173 and 180-184, wherein chiral amino acids of the peptidic agent are L-amino acids;
• and
• a non-peptidic antimicrobial agent, wherein concentrations of the peptidic and non-peptidic antimicrobial agents are sufficient to synergistically inhibit microbial growth during liquid handling processes to prepare the coating composition, in storage of the coating composition or on an inanimate surface coated with the surface coating composition.