Tony, good work on the Stug. I think it is going very well specially being your second 1/48 armour build ever. Regarding your streaking challenge my thoughts are two:
1> If you wanted to airbrush the streaking/fading over the base colour as I made on the Whippet, bear in mind I made it at very painting early stage, and I used that airbrush streaking to paint a faded base coat and NOT as one true weathering process over the base colour. I mean the resulting thing is my true base coat on which I add weathering later.
2> But as I guess your intention was to add streaking as part of the weathering process (I mean the weathering we all add over the base coat) then my advice is NOT to use airbrush for that and to make that streaking by brush painting techniques (i.e. oil-doting like Dupes very well suggests or any other you like). In my humble opinion, airbrush is one very useful tool for painting general effects, but I believe 90% of the finish of a model is responsibility and product of pure brush painting most of the times, because airbrush is hard to command for that kind of very selective and controlled effects.
Waikong, for the airbrush streaking is not really necessary to paint very fine lines. The layering will make the lines thin.
Dupes, How is that turtle going?
Okay, the final pics of the Whippet are here and that implies my work for the GB is done which makes me VERY happy. I really have a good time every time I can join here because you guys make me feel very comfortable making models with you. Thanks guys for the support, kind words and the nice atmosphere. Sure we will meet again soon because I will follow the track of your works as much as I can.
Lu