I also keep a notebook of what colors were used. This allows me to pick the squad or formation back up if I put them down, or decide to expand it, as was the case with my flight of Valkyries.
I painted the lead ship many months before I got around to doing the other two, but looking at the finished trio you couldn't tell.
My Knight formation was slow going, but I am happy with the way they are turning out. Next is that step that can make or break the whole thing: the dreaded decals. The Knights have so many large ones that gloss-coat is a must. As we all know, sometimes gloss-coat is a bit tricky and can go very badly to give your model that frosty look you did not want. Wish me luck.
The Emperor Protects
He could look after my brush-tips a little more