The Impact of Isolationism on Small US Businesses… Does Protectionism Protect Them?

A small US manufacturer sells 60% of its products to foreign companies. If the US adopts a protectionist trade stance and increases antidumping duties on foreign countries, there's a good chance foreign countries will respond with duties of their own. As a small player in this international market, what can the US manufacturer do to mitigate the risks that duties destroy their future profitability?