I know I'm going to incur the wrath of some folks here, but it's always been my contention that the original plastic posts were never truly white. They're more like an ivory color, and have been so from the beginning. Did they age a shade or two; yeah, probably, but I don't think they were ever the ultra bright white (with an almost bluish tinge) that the repro posts are. If original plastic posts are really yellowed looking, that's one thing, but an ivory color is normal. I think they look just fine as long as they are clean. The repros are way too white and don't look good. Try aging them in a strong tea solution for a couple of weeks as I have done with pop bumper bodies.