In the past I have just left gaps in my models.
Now I want to fill them but I tried today and it got everywhere. What tool do you use to apply the filler?
What sort of filler do you use?
I use Squadron White, Mr. Surfacer 500, or Bondo Spot Putty, depending on the application. The Bondo putty works the best, though. You can get it at any auto parts store or Wal-Mart. It's dirt cheap compared to hobby putties, sticks to plastic, resin, and metal equally well, is creamy and easy to apply and work, dries 3 times faster, chips less, and sands smoother than Squadron, Tamiya, or Testor's. To apply it, I use a toothpick, a piece of plastic card, or a small sculpting spatula. You can get excellent results using a plastic card putty knife, and smoothing it with the edge. Cut the card to fit the space. Practice on an old model. It's just like spackling a wall before you paint.