I do not think it is paint, it is more like a decal. My truck has something similar going on with the stripes, but they are for sure decals, as some portions have peeled away significantly. Nissan probably had a few different decal packages; it was the 80's, after all!
The factory pulley for the idler has a bearing pressed in and locked with a retaining ring. My pulley is good, but the v-shape is grooved heavily. The Gates pulley has no retaining ring and sits too close to the tensioning mechanism (but suppose that I could insert a washer) Was the idea to replace the pulley bearing, or both the bearing and pulley?
Sorry I didn't get to this sooner, but I replaced the bearing and pulley