Scribe the panel with a scalpel. This creates a furrow but raises up the plastic either side. sounds a paradox but it does work, well it does on the airliners anyhow.
Either that or don't rub down so hard after priming.
I have 5 Airfix 109's and they are pretty, and you realy cn't tell much between those and my Hasegawa, then again they are on the wall
.
Just don't use the kit decals, the "Leopard over Africa" is awful.