After getting thoroughly annoyed at sunlight glinting off my shiny chrome ferrules on the paintbrush, I decided to do something about it.
Bring out sandpaper, enamel paint and a disposable brush. Sand the ferrule and paint on the black matte enamel paint, taking great care not to get paint on the bristles. Let themn thoroughly dry for 4 days, and paint pleine air glare free! Process needs to be repeated every few months, and some of the enamel paint will come off in little flecks, but Im fine with that, as long as I dont get that retina-burning sun reflection when Im out.
"Less farting about, more painting!" some would say, and you'd probably be right.