F-14

If you fill seams or gaps after painting it will show. You , as a minimum, would have to spot paint those areas and the paint may not match up. You said you were going to repaint the model anyway, wait till all filling, sanding and prep is done prior to painting. As for the wings, you have to paint them prior to assembly to the fuselage. On the final painting simply mask the wings with paper when painting the rest of the aircraft.

Jimz66,
I know this is not what you asked sorry. Maybe try this out during your seam filling preps.
Using sanding sticks to me is a good tool for sanding with. They come in various gradeds from extra fine,fine,med and corse.
After sanding go over it with the "extra fine" sanding stick,which leads me in an odd approach.
Take what ever piece you have just sanded and angle it towards the light,Looking across the surface. This especially works on leading edges of wings.
It will basically hilight the area that needs to be fixed.They will either appear a flat tone or a gap. Then you will know to fix that area.
You may find this good and maybe not, I have a 50-50 chance here (LOL). Good luck w/ your Tomcat. Flaps up Mike

Consider using Bare Metal Foil on the leading edges of the wing.

To paint the wings, it might be too late now but for next time, pre-paint them