Gaucho777. You sure are spoiled. That has to be one of the most extensive model paint displays I've ever seen. Better than either my local hobby shop or specialty shop. My local ACE has nothing like that. You're lucky.
I recently used model paint, enamel, to touch up a bike, and paint the frame pump I put on it. Testor's is good stuff but probably not as durable as enamels meant for exterior use. You can always clear coat it though, and it's fine for small touch ups on bikes.