How long does it take for the cement to set fully hard? In that setting, it should hold fine as long as it's fully cured. I was wondering how it compared to the pre 1976 solid rubber 8" wheels in weight, so it's acceptable there. I was thinking you'd leave the white part unpainted. It would fool the eye once it's mounted on the mower.
Are you going to do any front wheels? I imagine that would show more unless you carefully smooth the finish over.
