YES, what Bob said. As a long time nascar modeler, I've used tootpicks for lugs. get a box of wooden toothpicks. I prefer wooden so i can shave the tips down easily. it really helps alot with other lil stuff too. I dip the toothpick in the paint left in my jar lid. then a lil dab of it on the lugs.
ALSO there are extra fine tip paint pens with varying colours available if you have a hobby lobby or scrapbooking type place near you.