Originally Posted by microcord

My eyes are drawn to the boldly dimensioned dork disc and (Wiccan?) pentagram on the crankset.

I'd be tempted to replace and maintain where necessary, but avoid anything cosmetic. This could be the (covertly excellent) ratbike par excellence, to be ridden with pride wherever the Rapha-clad gather. Savour the horrified reactions, and let them eat your dust.