while at walmart tonight (was looking for shoelaces for my nephew) i stumpled across these in the shoe section, and thought they would work great for applying dressings to skinny side plastic panels/moldings, plastic vent area at the bottom of the windshield, and so forth (also keeps your hands clean). i bought a pack (contains 2 applicators) and cost $4.25 and the width of the small round foam is 1.75" (a little larger than a half dollar coin)...
Kiwi foam shoe polish applicators make applying paste or cream shoe polish quick and easy. Large built-in handles keep hands clean. The sturdy foam base allows the polish to be applied smoothly and evenly. For a brilliant shine, follow the easy steps.

Kiwi foam shoe polish applicators make applying paste or cream shoe polish quick and easy. Large built-in handles keep hands clean. The sturdy foam base allows the polish to be applied smoothly and evenly. For a brilliant shine, follow the easy steps.