@fredgroves, "
You can always use tippex on it or just wait until your significant other helpfully removes it on a curb". Prefer the former to the latter Fred

- though maybe a black Sharpie pen will suffice to colour the R letter in?

@JoeGTI, I definitely get what you're saying on the long term swirling effect from having black wheels. I was actually pleased when a painted wheel option appeared on the VW configurator, as I really didn't want diamond-cut wheels again. Granted a black wheel colour was not my ideal choice, one of the reasons being the one you've stated. I would have really liked if VW offered a silver or gunmetal grey paint option, but the options are the options at time of order.
My intention is to keep the Clubsport for a minimum of 5 years - it may creep to as long as I've had my Mk6... So I reckoned the upkeep/maintenance of painted black wheels would probably be less expensive - I agree with @SRGTD's points on this.
In the 9 years of Mk6 ownership, I've had its set of Monza Shadow wheels re-cut twice due to whiteworm, on the third refurb (due to a curb getting in the way

) I got them painted gunmetal grey.
For me choosing the black Estoril wheels was the lesser of two evils. With my expectation (hope?) that painted wheels should be a more durable finish over the longer term. If I was only keeping a car for 1 to 2 years, it probably wouldn't bother me as much.
I'll definitely have a look into that Armorall Wheel Shield that @king monkey's mentioned. Handy tip.