There are tons of items printed smaller than this, looking great as a highly detailed model part in this scale? I have yet to see such a thing. I have seen 3D printed turbos, intercoolers, manifolds, etc. in 1/25 scale and while they look cool during "mock up" they are more a "novelty" in reality with the grainy surface texture they exhibit. You cannot yet achieve very crisp highly detailed pieces of this size in this scale right now (think injection molded or resin cast quality). A turbo or procharger like unit in 1/25 would be very small and highly detailed. Trying to rid the printed piece of its texture in this size would simply remove any of that detail you did manage to print and ultimately be a waste of time and effort. You will essentially wind up with a sanded down unrealistic blob. Gook luck with your endeavor however.