Now that the darkening of the panel lines is done, I've started working on the rust . . . and it's a good idea to start with the darkest rust (mine is Floquil rust 50% and Floquil roof brown 50%) to which I add a few drops of Floquil orange to brighten it . . .
Again, you think the shadowing of the panel lines is not a big deal, and although you can't see it in these pictures, they are still there, and it helps to have them show through subtely . . .
Again, the idea is to get full coverage before beginning to add a bit more orange to the rust mixture so that the rust lightens in spots . . .
Stay tuned in for more progress . . .