Cheers for the replies guys, I try to answer each individually !!!
If it is like most brakes, you just need the 5 sided tool and it should screw right out. But you will probably need an overhaul kit since the brake fluid will run out and while you are anodizing it, the seals might dry up and probably get contaminated too. This is going to be a heck of a lot of work for that little bit. Why not just get a black Sharpie marker and color it or paint it with black paint?
I probably will colour it in with a black marker, the other red bolts on the caliper and master cylinder / brake lever are easy to remove and will be anodized in green, I really wanted to get this part green as well but it might be a bit too much of a hassle to do, I don;t want to wreck my new brakes !!!
All R1 color combinations come from a guy in Italy thet sells the sets on ebay.it I can PM you his email, so maybe you could purchase this part anodized black if that's what you need, or he could do a different color for you. Who knows.
I did order these brakes from the guy in Italy (clood69 on Italian eBay) because I wanted the white R1 with carbon levers, I just can't get green anodized ones to replace the red bits.
I have done on my brakes. I made the little tool at work and it came right out. The reason for doing this was to anodize the caliber gold and the cap black so it fit my Scott Scale LTD. you have to be aware of that it is a nightmare to bleed them afterwards as they have been completely empty of fluid.
Enjoy your work.
Was it very tight / hard to remove ? I may be able to get the tool I need through a mechanic I know, in which case it may be worth doing. I don't think you can buy the tool and I don;t want to damage the brake removing it. Maybe a job for when it is too cold and frozen to ride in UK.
If not I will get a magic marker and colour it black. I did also think about using some green nail varnish but that will only add weight
Thanks again guys, knowing that someone has done it might make me have a go myself.