@izzythepush,
You can, if you like. I have never encountered the expression "rough hewn cloth." To me, it makes no more sense than "hewn light."
OK, this is from Merriam-Webster's online dictionary, a definition of rough hewn:
1: being in a rough, unsmoothed, or unfinished state : crudely formed <rough–hewn beams>
2: lacking refinement <he was rather attractive, in a rough–hewn kind of way
— Jan Speas>
. . . which would encompass "rough hewn cloth."
This is the definition of hewn with which i am familiar:
hewn - cut or shaped with hard blows of a heavy cutting instrument like an ax or chisel; "a house built of hewn logs"; "rough-hewn stone"; "a path hewn through the underbrush"
(The source is the Free Online Dictionary, which cites the American Heritage Dictionary.)
So i guess we'll just have to charge me with a lack of imagination.