Photo Etch detail accessories are typically available for many kits. (Ships, aircraft, armor, cars, etc.) These are attached using a CA glue. I like to use 43mm aluminum dishes to hold a small amount of CA glue. CA glue is cured by air. So the less you leave the bottle open to air the longer the bottle will last. I make a small pool of CA glue in the aluminum dish. The glue can be applied using a toothpick, pin, or dental pick.
However I found a product that works excellent for applying a small amount of glue in exactly the right spot. It is called the Glue Looper. I have included a link to their website which has some very good video’s on how to use it. The tips last for many applications.
Glue Looper website and videos: Glue Looper
Where to buy:
Glue Looper: The Glue Looper