I think i'm thinning my paint too much

[Emp]

That depends on what you try to paint. When it has alot of detail (a face) try thinning down to rhe sustance of lets say milk. Stuff like cloaks, armor, pants, ... Can be painted with thicker.
Try searching the paintguide here, if I'm not mistaken there is some advice on just how thin the paint can be.

I made the mistake of not thinning down enough at first