Scabrous

Scabrous: Scabrous shares its etymology with scab, but that only offers the barest, obscure hint of its meaning. Scabrous mean rough, as in: His knee was covered with a scabrous scab after he fell off his skateboard on the scabrous concrete. Next time he'll wear proper protection. Metaphorically it might be used to describe a scabrous problem, or even as a synonym for salacious.

A scabrous folding chair stood on what remained of a crude front porch, shedding paint flakes the color of dried mustard as rust worked its way underneath.