They are black molded plastic (not painted).
You definitely don't by them for finish. They are not glossy at all and the surface is by no means perfect. You can see molding pocks & stuff on them (little sand grain sized things here and there). If you are concerned about "finish" you will not like them. I'm trying to think of an equivalent plastic finish in every day life.. but all that comes to mind is "a thick version of the plastic used in dirtbike gas tanks".
The white ones turn yellow.
The orange ones look like a giant pumpkin.
The black ones explode in the sun.
I chose the lesser of the 3 evils. Why did I spend $1500 on these again? (j/k)
All that said, I really like the finish on the tanks. It gives the bike a "tougher offroad" appearance so that the harley guys don't think you are on a sportbike with knobblies
I dunno how the "adventure" labeling is done. I was looking at it and I can't tell. I dunno if its a "surface mar" in the molding or if it is sprayed on or what
I like it a lot though.. I'm digging the subtleness of the black on black