This has been my experience;
General protection can be accommodated by the per-foot nylon type sleeve material. In areas where there may be more aggressive abrasion, you can use the hard poly, yet semi flexible, guards supplied by various manufactures. These can be "pinned" or "wrapped around" the line to prevent excessive contact. The ones I have used came in a semi-curved state, and you could cut, trim them for various applications. It is hard to explain what they look like, but you see them a lot in "pinch" areas on skid steers.