1stly remove every bit of dither there is.
lets start with basic color assignment.
i have edited those pipe things. their light source is completely opposite of that for everything else.

1: dither this partwith grey.only.
2: undither this place.
3: darken the edges pointing away from the curve.

also, add some shine to those panels, maybe dither on the grey pannel the light coming from them. if not then add a small shadow.

Hope this helps.