Squadron White Modelers Putty. 2.3oz tube

Everyone should have a tube of this stuff on their work desk. Its been a staple for model builders and painters for years.

Its greatest attributes are its easy to use and dries quickly. Squeeze a small blob onto a piece of card and using a small screwdriver or old knife, spread it onto the area. After its applied and smoothed into place, you can clean up the area even more with a cotton swab dipped into some acetone. When the putty is dry, wash and prime the model as usual.

Another way to use it is by mixing it with acetone and use a old brush to brush it on. This is very helpful in hard to reach areas. You want about a 60%/40% putty to acetone ratio, but you can adjust that till your'e happy. Whichever brush you use to apply it, don't expect to use it for any painting again.