I simply removed the paint from mine and that's it. Tried few techniques and eventually done it using paint thinner and my fingernails. Took me few hours and sore fingers. At the end, polished the plastic using polishing wheel for drilling machine and paint polisher liquid (for car paint finish). After all was done, I used shoeshine polish wax.
It is not perfect but now it can resist anything as there is no paint to scratch. Only if you come very close to the rack and carefully look at it you can see that there is no paint. Anything further the 30cm and it looks like it was painted satin black.
I've done this few weeks ago thinking about new model DL1000 I was going to purchase next September. New bike has black subframe and only silver piece is rear rack. So, silver rack from new bike is going on my actual '14 model to trade it in and actual black rack is going onto new bike.
2017 DL1000 White
2014 DL1000 Red (sold)
2012 DL650 White (sold)