it's up to you i can see this from your point of view, i have just put a new engine in mine but when i thought about it i decided i couldn't be arsed with shiny bits as they don't make it go any faster or maybe it's my brain making excuses for me being a fat lazy bastard, and also my fat fingers are not suited to polishing i had a series 1 and my missus polished all chrome etc for me. so really if you can be bothered and can justify it go for it, but for me as long as it goes sideways at any given opportunity and canes scoobies and evos it's all good