i didnt do it myself no, but for one good reason, i needed to buy all the equipment (paint brushes, axle stands) and the costs came to just shy of £40, i'm fortunate enough to have a really good VAG specialist/garage locally which did for me for £50 all in, so for the sake of £10, i let the pro's do it.
My calipers where 100% standard and in that funny grey/silver colour.
If you do it your self make sure you use hammerite, it gives a great finish and a great colour, if you look on my thread, you'll see a cracking picture of the calipers through the alloys.