I haven't bought them yet, but will probably go with the R2000. My wife has the 2400 (dual lever), and I put a set of 2300's with the thumb downshift on my son's road bike.

Since they are the dark gray, I imagine they are powder coated.

I've got acetone because I've been fixing our kids, (and mine), surfboards for years. I Googled and found that there is something called Benco B17, but that stuff is so nasty I would never consider it.

I'll need to test the acetone with scotch brite pads on something else first and see how it goes.

Thanks!

John