Had mine done around May last year, cost me £80 a corner and had all four done (acid dipped and powder coated). They were able to march the F Sport colour pretty well.
Are you sure they are meant to though?, with the front drl's the rear lights tend not to come on. I am personally no a fan of this approach and rather prefer it if both front and rear light up. However manufacturers have recently(over the last few years) started adopting this approach so both front and rear light up. Hope this helps.
Just an add on,you can take it or leave it, choice is yours, my independent garage used to offer an engine flush as part of a service but have since stopped,now an option if you ask for it
Congratulations and welcome to the LOC Balazs,hope you find the forum informative and educational, hopefully someone will come along and answer your question