Did you drop the hood on the wheel when raising the back of the hood. That is why mine has patina!
Me too

I am now very careful about that. My bit of patina is no-longer as I had the rim re-wooded to match my new dash
I nearly always were gloves when driving with a wood rimmed wheel. Heavy padded gloves in winter, light leather gloves in spring and autumn, and mesh backed gloves in summer.