I'm not sure what you mean by toning them down to scale?
The seat, sign and plaque are supposed to stand out. They are meant to
look new and just painted so that they have maximum contrast against
the grimy leaf covered ground. Also, when you have a man-made object
set against nature, the object naturally stands out more.
They also give the scene, especially the tree, a sense of scale...it's 1/35 incidentally.
Never mind, everyone sees things differently.
Best wishes
Glen