It's looking really good Chris. The weathering/wear looks very convincing, good work mate.
To dull-down those yellow clogs, try a very light dry brushing of light brown. Apply it sparingly, then lightly rub off any excess. I've done it on yellow numbers and letters that have been too bright, and it seems to work OK. Another method is 'damp brushing', using the same colour paint, fairly thin, and only just dampening the tip of a small brush. Spot it on, then gently move it around in a circular fashion until the desired effect is achieved. If it looks too heavy or too dark, lightly rub it with cotton wool. That should remove the excess, and leave a thin deposit, like a stain. It's more accurate than dry brushing, but takes a little longer.