I had to chuckle a bit when I read your question. Seriously, we’re talking about a model tank right? I assume 1/35 scale but even if bigger, how can the smell produced by no more enamel than it takes to paint a model that size even be noticeable really? We must be talking about the very slightest odor here. Perhaps my years as a painter have left me somewhat jaded. In fact, I rather enjoy the smell of freshly brushed alkyd enamel. It’s the smell of fresh and new (not to mention money[;)]). I use nothing but enamel on my 1/48 model aircraft and I don’t even notice a smell after they’re painted. Wow, you must have a very sensitive nose my friend…
On the rare occasions when I have had this happen, it is usually gone within a day. Two at most. And I am like Tex, an unrepantant die hard enamel fan/user…