I have a 1974 R90/6 that had a poor home life...she now expects better. I honed the cylinders and painted them black, used the oven to cure the paint...lucky for me my wife was away for the weekend, the smell of old cylinders and paint, well, I was surprised. Heads were stripped and a friend lapped and cleaned up the valves and head. Prior to this work I bead blasted the years of neglect off the metal fins. The cylinders being so clean took the new paint very well, it looks and feels real tough/long lasting. I am stuck as to what if any treatment I should apply to heads and valve covers. They are both bead blasted and i would guess would get dirty fast when riding. On my other bikes I use WD40 applied w. A scotch brite pad. They clean up quickly after getting dirty. What I am looking for is comments on the results of paint and what color the silver might be, or maybe black. What are the pros and cons on paint to the heads and valve covers? I have never painted engine parts on any of my bikes.